Framework: Forward port Power widget fixes and fix disabling

This commit fixes the ability to disable/hide the power widget on CM10.1, hide
the widget by default and forward ports a few other related fixes:

Author: Danesh
1) Notification Widgets : Fix vibration
The initial value of the array determines how long till the vibration starts,
and second value determines how long to leave it on till.

Since config_virtualKeyVibePattern is in an overlay and we cannot rely on its consitency,
we check the length of the array, and based on it execute the appropriate vibration.

2) NotificationPowerWidget : Snap widgets
Snap widgets in place, rather than allowing partial widgets

3) Framework Track Control : Switch from broadcast to audio service
Ordered broadcast is unreliable. Switch to using the Audio Service's
dispatchMediaKeyWithWakeLockToAudioService as it sends the event to the correct receiver.

4) AutoRotateButton : Minor cleanup
Use setRotationLock to avoid code duplication and staying consistent with framework

Change-Id: I0b5d1853781a7e6541a4a6283e13f8072d9972b3

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Framework: Forward port Battery light support and fixes

Change-Id: Ic81d3ffb7548c7b7e34ffecd2f9db781f13b705d