Refactor ComponentListener of PlayerWrapper

PiperOrigin-RevId: 343432873

RELEASENOTES.md

@@ -80,6 +80,9 @@
         that lie outside the length of the cue text.
 *   Metadata retriever:
     *   Parse Google Photos HEIC motion photos metadata.
+*   Media2 extention:
+    *   Notify onBufferingEnded when the state of origin player becomes
+        STATE_IDLE or STATE_ENDED.
 
 ### 2.12.1 (2020-10-23) ###
 

extensions/media2/src/androidTest/java/com/google/android/exoplayer2/ext/media2/SessionPlayerConnectorTest.java

@@ -826,7 +826,6 @@ public class SessionPlayerConnectorTest {
             }
           }
         });
-    sessionPlayerConnector.setPlaylist(playlistToSessionPlayer, /* metadata= */ null);
     InstrumentationRegistry.getInstrumentation()
         .runOnMainSync(() -> playerTestRule.getSimpleExoPlayer().setMediaItems(exoMediaItems));
     assertThat(onPlaylistChangedLatch.await(PLAYLIST_CHANGE_WAIT_TIME_MS, MILLISECONDS)).isTrue();