Set player on ads loader in IMA demo

Issue: #5476
PiperOrigin-RevId: 232503736

demos/ima/src/main/java/com/google/android/exoplayer2/imademo/PlayerManager.java

@@ -29,10 +29,6 @@ import com.google.android.exoplayer2.source.ads.AdsMediaSource;
 import com.google.android.exoplayer2.source.dash.DashMediaSource;
 import com.google.android.exoplayer2.source.hls.HlsMediaSource;
 import com.google.android.exoplayer2.source.smoothstreaming.SsMediaSource;
-import com.google.android.exoplayer2.trackselection.AdaptiveTrackSelection;
-import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
-import com.google.android.exoplayer2.trackselection.TrackSelection;
-import com.google.android.exoplayer2.trackselection.TrackSelector;
 import com.google.android.exoplayer2.ui.PlayerView;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
@@ -56,14 +52,9 @@ import com.google.android.exoplayer2.util.Util;
   }
 
   public void init(Context context, PlayerView playerView) {
-    // Create a default track selector.
-    TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory();
-    TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
-
     // Create a player instance.
-    player = ExoPlayerFactory.newSimpleInstance(context, trackSelector);
-
-    // Bind the player to the view.
+    player = ExoPlayerFactory.newSimpleInstance(context);
+    adsLoader.setPlayer(player);
     playerView.setPlayer(player);
 
     // This is the MediaSource representing the content media (i.e. not the ad).
@@ -89,6 +80,7 @@ import com.google.android.exoplayer2.util.Util;
       contentPosition = player.getContentPosition();
       player.release();
       player = null;
+      adsLoader.setPlayer(null);
     }
   }