player: seek to new index when given a new playqueue with a different index

This happens in the MediaBrowserServiceCompat flow (playing a playlist).

Author: haggaie

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -388,6 +388,10 @@ public void handleIntent(@NonNull final Intent intent) {
                     == com.google.android.exoplayer2.Player.STATE_IDLE) {
                 simpleExoPlayer.prepare();
             }
+            if (playQueue.getIndex() != newQueue.getIndex()) {
+                simpleExoPlayer.seekTo(newQueue.getIndex(),
+                        newQueue.getItem().getRecoveryPosition());
+            }
             simpleExoPlayer.setPlayWhenReady(playWhenReady);
 
         } else if (intent.getBooleanExtra(RESUME_PLAYBACK, false)