Update views when a new track name provider is set

Also update TrackSelectionView with nullness annotations.

Issue: #4263

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=196849706

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

@@ -21,6 +21,8 @@ import android.app.Dialog;
 import android.content.Context;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface;
 import android.content.res.TypedArray;
 import android.content.res.TypedArray;
+import android.support.annotation.AttrRes;
+import android.support.annotation.Nullable;
 import android.util.AttributeSet;
 import android.util.AttributeSet;
 import android.util.Pair;
 import android.util.Pair;
 import android.view.LayoutInflater;
 import android.view.LayoutInflater;
@@ -54,7 +56,7 @@ public class TrackSelectionView extends LinearLayout {
   private int rendererIndex;
   private int rendererIndex;
   private TrackGroupArray trackGroups;
   private TrackGroupArray trackGroups;
   private boolean isDisabled;
   private boolean isDisabled;
-  private SelectionOverride override;
+  private @Nullable SelectionOverride override;
 
 
   /**
   /**
    * Gets a pair consisting of a dialog and the {@link TrackSelectionView} that will be shown by it.
    * Gets a pair consisting of a dialog and the {@link TrackSelectionView} that will be shown by it.
@@ -100,11 +102,13 @@ public class TrackSelectionView extends LinearLayout {
     this(context, null);
     this(context, null);
   }
   }
 
 
-  public TrackSelectionView(Context context, AttributeSet attrs) {
+  public TrackSelectionView(Context context, @Nullable AttributeSet attrs) {
     this(context, attrs, 0);
     this(context, attrs, 0);
   }
   }
 
 
-  public TrackSelectionView(Context context, AttributeSet attrs, int defStyleAttr) {
+  @SuppressWarnings("nullness")
+  public TrackSelectionView(
+      Context context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {
     super(context, attrs, defStyleAttr);
     super(context, attrs, defStyleAttr);
     TypedArray attributeArray =
     TypedArray attributeArray =
         context
         context
@@ -152,7 +156,7 @@ public class TrackSelectionView extends LinearLayout {
    * @param allowAdaptiveSelections Whether adaptive selection is enabled.
    * @param allowAdaptiveSelections Whether adaptive selection is enabled.
    */
    */
   public void setAllowAdaptiveSelections(boolean allowAdaptiveSelections) {
   public void setAllowAdaptiveSelections(boolean allowAdaptiveSelections) {
-    if (!this.allowAdaptiveSelections == allowAdaptiveSelections) {
+    if (this.allowAdaptiveSelections != allowAdaptiveSelections) {
       this.allowAdaptiveSelections = allowAdaptiveSelections;
       this.allowAdaptiveSelections = allowAdaptiveSelections;
       updateViews();
       updateViews();
     }
     }
@@ -168,12 +172,14 @@ public class TrackSelectionView extends LinearLayout {
   }
   }
 
 
   /**
   /**
-   * Sets the {@link TrackNameProvider} used to generate the user visible name of each track.
+   * Sets the {@link TrackNameProvider} used to generate the user visible name of each track and
+   * updates the view with track names queried from the specified provider.
    *
    *
    * @param trackNameProvider The {@link TrackNameProvider} to use.
    * @param trackNameProvider The {@link TrackNameProvider} to use.
    */
    */
   public void setTrackNameProvider(TrackNameProvider trackNameProvider) {
   public void setTrackNameProvider(TrackNameProvider trackNameProvider) {
     this.trackNameProvider = Assertions.checkNotNull(trackNameProvider);
     this.trackNameProvider = Assertions.checkNotNull(trackNameProvider);
+    updateViews();
   }
   }
 
 
   /**
   /**
@@ -306,20 +312,20 @@ public class TrackSelectionView extends LinearLayout {
       override = new SelectionOverride(groupIndex, trackIndex);
       override = new SelectionOverride(groupIndex, trackIndex);
     } else {
     } else {
       // An existing override is being modified.
       // An existing override is being modified.
-      boolean isEnabled = ((CheckedTextView) view).isChecked();
       int overrideLength = override.length;
       int overrideLength = override.length;
-      if (isEnabled) {
+      int[] overrideTracks = override.tracks;
+      if (((CheckedTextView) view).isChecked()) {
         // Remove the track from the override.
         // Remove the track from the override.
         if (overrideLength == 1) {
         if (overrideLength == 1) {
           // The last track is being removed, so the override becomes empty.
           // The last track is being removed, so the override becomes empty.
           override = null;
           override = null;
           isDisabled = true;
           isDisabled = true;
         } else {
         } else {
-          int[] tracks = getTracksRemoving(override.tracks, trackIndex);
+          int[] tracks = getTracksRemoving(overrideTracks, trackIndex);
           override = new SelectionOverride(groupIndex, tracks);
           override = new SelectionOverride(groupIndex, tracks);
         }
         }
       } else {
       } else {
-        int[] tracks = getTracksAdding(override.tracks, trackIndex);
+        int[] tracks = getTracksAdding(overrideTracks, trackIndex);
         override = new SelectionOverride(groupIndex, tracks);
         override = new SelectionOverride(groupIndex, tracks);
       }
       }
     }
     }