call setPlayWhenReady in any case

ISSUE: #6093
PiperOrigin-RevId: 255471282

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

@@ -1089,8 +1089,9 @@ public final class MediaSessionConnector {
           }
         } else if (player.getPlaybackState() == Player.STATE_ENDED) {
           controlDispatcher.dispatchSeekTo(player, player.getCurrentWindowIndex(), C.TIME_UNSET);
-          controlDispatcher.dispatchSetPlayWhenReady(player, /* playWhenReady= */ true);
         }
+        controlDispatcher.dispatchSetPlayWhenReady(
+            Assertions.checkNotNull(player), /* playWhenReady= */ true);
       }
     }