Fix javadoc reference to StyledPlayerView in cast demo app

This should have been done in
https://github.com/google/ExoPlayer/commit/098c3a010edb2461b65496b1229bd08b14b0f0d6

PiperOrigin-RevId: 411073049

demos/cast/src/main/java/com/google/android/exoplayer2/castdemo/PlayerManager.java

@@ -28,7 +28,6 @@ import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.TracksInfo;
 import com.google.android.exoplayer2.ext.cast.CastPlayer;
 import com.google.android.exoplayer2.ext.cast.SessionAvailabilityListener;
-import com.google.android.exoplayer2.ui.PlayerView;
 import com.google.android.exoplayer2.ui.StyledPlayerControlView;
 import com.google.android.exoplayer2.ui.StyledPlayerView;
 import com.google.android.gms.cast.framework.CastContext;
@@ -67,7 +66,7 @@ import java.util.ArrayList;
    *
    * @param context A {@link Context}.
    * @param listener A {@link Listener} for queue position changes.
-   * @param playerView The {@link PlayerView} for playback.
+   * @param playerView The {@link StyledPlayerView} for playback.
    * @param castContext The {@link CastContext}.
    */
   public PlayerManager(