Make MediaController use low profile system UI
Make MediaController use low profile system UI

This makes the MediaController iused by the full screen html5 video
view copy the system ui visibility of its owner. Some issues remain.
b/5494143

Change-Id: I6b157226974befbee5ba685d42d1ef72c113664d

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base