Draw a battery level around unlock ring [1/2]
Credits Guillaume Lesniak - Omni
Guillaume Lesniak <me@xplod.fr>
https://gerrit.omnirom.org/#/c/1819
Change-Id: I2282a65c28c8e43d4fefc66417824ba7cd68395a

Conflicts:
	core/java/com/android/internal/widget/multiwaveview/GlowPadView.java