Swap volume buttons when the screen is rotated by 90 or 180 degrees

Change to default behaviour not configurable due that it is now
more natural

Change-Id: I323b647066e8c73fac60067141d1add7b2f9962d

Conflicts:

	media/java/android/media/AudioManager.java

Conflicts:
	media/java/android/media/AudioManager.java