Mark the multiwindow divider as a trusted overlay. am: b9be0cf397 am: ddbe6c4e8e
am: 586b34e7fe

* commit '586b34e7fe7f1eeb8b18cfe0545208ea7f38d874':
  Mark the multiwindow divider as a trusted overlay.

Change-Id: I1445fcf8655b347a937d73e0f866360b51092ec2