Increase available volume levels

Increase media volume levels from 15 to 30 to have more precise
volume control instead of having only 15 levels from 0-100%

For example, when listening to music it is often the case that one
volume level is too quiet and the next one higher is too loud (especially with Headsets).

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I7a8750c901967ce3c818fb9c33b082af6b86b8d6

Conflicts:
	media/java/android/media/AudioManager.java
Speed up notification pulldown and a few other things
If your bum is leaking, you need to be seeking: rocka pads

Change-Id: I4843e2274d54f445a0ef755aa0e92329de1deea5
HeadsUp: Fix dismiss on back key press.

Change-Id: Ia213aeba114d153f5561622a2bea884963f3d8a1

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