Add option to reset battery stats (1/2)

Thanks to CyanogenMod and @jruesga

Change-Id: I517c553c120b5a8335729f84a9fef83001c56e70
Live Volume Steps [1/2]

-Volume steps changes are instant, no need to reboot!

Change-Id: I4b330e02349539bbd01964736e33864df4921f9d
Signed-off-by: STELIX <ssspinni@gmail.com>

Conflicts:
	media/java/android/media/AudioService.java