Active Display: Force fullscreen

* ActiveDisplay (AD) isn't as appealing when transparent navbar shows.
  Force FULLSCREEN and hide all decorations

Change-Id: Iddce1a6143044d73492c32501295cbf1fc8b6500
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java