Update FocusParkingView

1. When the FocusParkingView receives ACTION_DISMISS event, it will
try to focus on the default focus.
2. Make the play/pause button the default focus.
3. Make the album background non-focusable.

Bug: 158797952
Test: manual

Change-Id: Ice0d7c6f3c299c9652c42161fab16d278a79c937
3 files changed