Listen to playWhenReady changes in LeanbackPlayerAdapter

#minor-release

Issue: google/ExoPlayer#10420
PiperOrigin-RevId: 460223064
(cherry picked from commit 4eb34e4c)

RELEASENOTES.md

@@ -26,6 +26,9 @@
 *   RTSP:
     *   Add RTP reader for H263
         ([#63](https://github.com/androidx/media/pull/63)).
+*   Leanback extension:
+    *   Listen to `playWhenReady` changes in `LeanbackAdapter`
+        ([10420](https://github.com/google/ExoPlayer/issues/10420)).
 
 ### 1.0.0-beta01 (2022-06-16)
 

libraries/ui_leanback/src/main/java/androidx/media3/ui/leanback/LeanbackPlayerAdapter.java

@@ -237,11 +237,6 @@ public final class LeanbackPlayerAdapter extends PlayerAdapter implements Runnab
     // Player.Listener implementation.
 
     @Override
-    public void onPlaybackStateChanged(@Player.State int playbackState) {
-      notifyStateChanged();
-    }
-
-    @Override
     public void onPlayerError(PlaybackException error) {
       Callback callback = getCallback();
       if (errorMessageProvider != null) {
@@ -285,5 +280,13 @@ public final class LeanbackPlayerAdapter extends PlayerAdapter implements Runnab
       int scaledWidth = Math.round(videoSize.width * videoSize.pixelWidthHeightRatio);
       getCallback().onVideoSizeChanged(LeanbackPlayerAdapter.this, scaledWidth, videoSize.height);
     }
+
+    @Override
+    public void onEvents(Player player, Player.Events events) {
+      if (events.containsAny(
+          Player.EVENT_PLAY_WHEN_READY_CHANGED, Player.EVENT_PLAYBACK_STATE_CHANGED)) {
+        notifyStateChanged();
+      }
+    }
   }
 }