Don't call stop() on playable item clicked

Fixes: 142051088
Test: Manual
Change-Id: I514367bb600726bf74678ff94a948d50aa5ad92b
diff --git a/src/com/android/car/media/MediaActivity.java b/src/com/android/car/media/MediaActivity.java
index c3bef92..36552cf 100644
--- a/src/com/android/car/media/MediaActivity.java
+++ b/src/com/android/car/media/MediaActivity.java
@@ -674,7 +674,6 @@
 
     @Override
     public void onPlayableItemClicked(MediaItemMetadata item) {
-        mPlaybackController.stop();
         mPlaybackController.playItem(item);
         boolean switchToPlayback = getResources().getBoolean(
                 R.bool.switch_to_playback_view_when_playable_item_is_clicked);