Add convenience Player.isCurrentWindowLive method.

PiperOrigin-RevId: 272005632

library/core/src/main/java/com/google/android/exoplayer2/BasePlayer.java

@@ -128,6 +128,12 @@ public abstract class BasePlayer implements Player {
   }
 
   @Override
+  public final boolean isCurrentWindowLive() {
+    Timeline timeline = getCurrentTimeline();
+    return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isLive;
+  }
+
+  @Override
   public final boolean isCurrentWindowSeekable() {
     Timeline timeline = getCurrentTimeline();
     return !timeline.isEmpty() && timeline.getWindow(getCurrentWindowIndex(), window).isSeekable;

library/core/src/main/java/com/google/android/exoplayer2/Player.java

@@ -962,6 +962,13 @@ public interface Player {
   boolean isCurrentWindowDynamic();
 
   /**
+   * Returns whether the current window is live, or {@code false} if the {@link Timeline} is empty.
+   *
+   * @see Timeline.Window#isLive
+   */
+  boolean isCurrentWindowLive();
+
+  /**
    * Returns whether the current window is seekable, or {@code false} if the {@link Timeline} is
    * empty.
    *