Clean up MediaSessionExt documentation

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=163828712

extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/DefaultPlaybackController.java

@@ -21,40 +21,50 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Player;
 
 /**
- * A default implementation of the {@link MediaSessionConnector.PlaybackController}. You can safely
- * override any method for instance to intercept calls for a given action.
+ * A default implementation of {@link MediaSessionConnector.PlaybackController}.
+ * <p>
+ * Methods can be safely overridden by subclasses to intercept calls for given actions.
  */
 public class DefaultPlaybackController implements MediaSessionConnector.PlaybackController {
 
+  /**
+   * The default fast forward increment, in milliseconds.
+   */
+  public static final int DEFAULT_FAST_FORWARD_MS = 15000;
+  /**
+   * The default rewind increment, in milliseconds.
+   */
+  public static final int DEFAULT_REWIND_MS = 5000;
+
   private static final long BASE_ACTIONS = PlaybackStateCompat.ACTION_PLAY_PAUSE
       | PlaybackStateCompat.ACTION_PLAY | PlaybackStateCompat.ACTION_PAUSE
       | PlaybackStateCompat.ACTION_STOP;
 
-  protected final long fastForwardIncrementMs;
   protected final long rewindIncrementMs;
+  protected final long fastForwardIncrementMs;
 
   /**
-   * Creates a new {@link DefaultPlaybackController}. This is equivalent to calling
-   * {@code DefaultPlaybackController(15000L, 5000L)}.
+   * Creates a new instance.
+   * <p>
+   * Equivalent to {@code DefaultPlaybackController(
+   *     DefaultPlaybackController.DEFAULT_REWIND_MS,
+   *     DefaultPlaybackController.DEFAULT_FAST_FORWARD_MS)}.
    */
   public DefaultPlaybackController() {
-    this(15000L, 5000L);
+    this(DEFAULT_REWIND_MS, DEFAULT_FAST_FORWARD_MS);
   }
 
   /**
-   * Creates a new {@link DefaultPlaybackController} and sets the fast forward and rewind increments
-   * in milliseconds.
+   * Creates a new instance with the given fast forward and rewind increments.
    *
-   * @param fastForwardIncrementMs A positive value will cause the
-   *     {@link PlaybackStateCompat#ACTION_FAST_FORWARD} playback action to be added. A zero or a
-   *     negative value will cause it to be removed.
-   * @param rewindIncrementMs A positive value will cause the
-   *     {@link PlaybackStateCompat#ACTION_REWIND} playback action to be added. A zero or a
-   *     negative value will cause it to be removed.
+   * @param rewindIncrementMs The rewind increment in milliseconds. A zero or negative value will
+   *     cause the rewind action to be disabled.
+   * @param fastForwardIncrementMs The fast forward increment in milliseconds. A zero or negative
+   *     value will cause the fast forward action to be removed.
    */
-  public DefaultPlaybackController(long fastForwardIncrementMs, long rewindIncrementMs) {
-    this.fastForwardIncrementMs = fastForwardIncrementMs;
+  public DefaultPlaybackController(long rewindIncrementMs, long fastForwardIncrementMs) {
     this.rewindIncrementMs = rewindIncrementMs;
+    this.fastForwardIncrementMs = fastForwardIncrementMs;
   }
 
   @Override

extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/RepeatModeActionProvider.java

@@ -26,10 +26,13 @@ import com.google.android.exoplayer2.util.RepeatModeUtil;
  */
 public final class RepeatModeActionProvider implements MediaSessionConnector.CustomActionProvider {
 
+  /**
+   * The default repeat toggle modes.
+   */
+  public static final @RepeatModeUtil.RepeatToggleModes int DEFAULT_REPEAT_TOGGLE_MODES =
+      RepeatModeUtil.REPEAT_TOGGLE_MODE_ONE | RepeatModeUtil.REPEAT_TOGGLE_MODE_ALL;
+
   private static final String ACTION_REPEAT_MODE = "ACTION_EXO_REPEAT_MODE";
-  @RepeatModeUtil.RepeatToggleModes
-  private static final int DEFAULT_REPEAT_MODES = RepeatModeUtil.REPEAT_TOGGLE_MODE_ONE
-      | RepeatModeUtil.REPEAT_TOGGLE_MODE_ALL;
 
   private final Player player;
   @RepeatModeUtil.RepeatToggleModes
@@ -39,20 +42,20 @@ public final class RepeatModeActionProvider implements MediaSessionConnector.Cus
   private final CharSequence repeatOffDescription;
 
   /**
-   * Creates a new {@link RepeatModeActionProvider}.
+   * Creates a new instance.
    * <p>
-   * This is equivalent to calling the two argument constructor with
-   * {@code RepeatModeUtil#REPEAT_TOGGLE_MODE_ONE | RepeatModeUtil#REPEAT_TOGGLE_MODE_ALL}.
+   * Equivalent to {@code RepeatModeActionProvider(context, player,
+   *     RepeatModeActionProvider.DEFAULT_REPEAT_TOGGLE_MODES)}.
    *
    * @param context The context.
    * @param player The player on which to toggle the repeat mode.
    */
   public RepeatModeActionProvider(Context context, Player player) {
-    this(context, player, DEFAULT_REPEAT_MODES);
+    this(context, player, DEFAULT_REPEAT_TOGGLE_MODES);
   }
 
   /**
-   * Creates a new {@link RepeatModeActionProvider} for the given repeat toggle modes.
+   * Creates a new instance enabling the given repeat toggle modes.
    *
    * @param context The context.
    * @param player The player on which to toggle the repeat mode.

extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/TimelineQueueNavigator.java

@@ -29,9 +29,8 @@ import java.util.Collections;
 import java.util.List;
 
 /**
- * An abstract implementation of the {@link MediaSessionConnector.QueueNavigator} that's based on an
- * {@link Player}'s current {@link Timeline} and maps the timeline of the player to the media
- * session queue.
+ * An abstract implementation of the {@link MediaSessionConnector.QueueNavigator} that maps the
+ * windows of a {@link Player}'s {@link Timeline} to the media session queue.
  */
 public abstract class TimelineQueueNavigator implements MediaSessionConnector.QueueNavigator {
 
@@ -44,10 +43,9 @@ public abstract class TimelineQueueNavigator implements MediaSessionConnector.Qu
   private long activeQueueItemId;
 
   /**
-   * Creates a new timeline queue navigator for a given {@link MediaSessionCompat}.
+   * Creates an instance for a given {@link MediaSessionCompat}.
    * <p>
-   * This is equivalent to calling
-   * {@code #TimelineQueueNavigator(mediaSession, DEFAULT_MAX_QUEUE_SIZE)}.
+   * Equivalent to {@code TimelineQueueNavigator(mediaSession, DEFAULT_MAX_QUEUE_SIZE)}.
    *
    * @param mediaSession The {@link MediaSessionCompat}.
    */
@@ -56,12 +54,11 @@ public abstract class TimelineQueueNavigator implements MediaSessionConnector.Qu
   }
 
   /**
-   * Creates a new timeline queue navigator for a given {@link MediaSessionCompat} and a maximum
-   * queue size of {@code maxQueueSize}.
+   * Creates an instance for a given {@link MediaSessionCompat} and maximum queue size.
    * <p>
-   * If the actual queue size is larger than {@code maxQueueSize} a floating window of
-   * {@code maxQueueSize} is applied and moved back and forth when the user is navigating within the
-   * queue.
+   * If the number of windows in the {@link Player}'s {@link Timeline} exceeds {@code maxQueueSize},
+   * the media session queue will correspond to {@code maxQueueSize} windows centered on the one
+   * currently being played.
    *
    * @param mediaSession The {@link MediaSessionCompat}.
    * @param maxQueueSize The maximum queue size.
@@ -80,12 +77,6 @@ public abstract class TimelineQueueNavigator implements MediaSessionConnector.Qu
    */
   public abstract MediaDescriptionCompat getMediaDescription(int windowIndex);
 
-  /**
-   * Supports the following media actions: {@code PlaybackStateCompat.ACTION_SKIP_TO_NEXT |
-   * PlaybackStateCompat.ACTION_SKIP_TO_PREVIOUS | PlaybackStateCompat.ACTION_SKIP_TO_QUEUE_ITEM}.
-   *
-   * @return The bit mask of the supported media actions.
-   */
   @Override
   public long getSupportedQueueNavigatorActions(Player player) {
     if (player == null || player.getCurrentTimeline().getWindowCount() < 2) {

library/ui/src/main/java/com/google/android/exoplayer2/ui/PlaybackControlView.java

@@ -249,11 +249,23 @@ public class PlaybackControlView extends FrameLayout {
 
   };
 
+  /**
+   * The default fast forward increment, in milliseconds.
+   */
   public static final int DEFAULT_FAST_FORWARD_MS = 15000;
+  /**
+   * The default rewind increment, in milliseconds.
+   */
   public static final int DEFAULT_REWIND_MS = 5000;
+  /**
+   * The default show timeout, in milliseconds.
+   */
   public static final int DEFAULT_SHOW_TIMEOUT_MS = 5000;
-  public static final @RepeatModeUtil.RepeatToggleModes int DEFAULT_REPEAT_TOGGLE_MODES
-      = RepeatModeUtil.REPEAT_TOGGLE_MODE_NONE;
+  /**
+   * The default repeat toggle modes.
+   */
+  public static final @RepeatModeUtil.RepeatToggleModes int DEFAULT_REPEAT_TOGGLE_MODES =
+      RepeatModeUtil.REPEAT_TOGGLE_MODE_NONE;
 
   /**
    * The maximum number of windows that can be shown in a multi-window time bar.