Add Power Menu Tile

Click once: Brings up Power Menu.

Long click: Will let you reboot your device.

Ported from:

Rascarlo's (https://github.com/rascarlo/platform_frameworks_base/commit/d9dbc4f6f9bb78683c21f8d28fb35c54cfe323b1)
CyanogenMod (http://review.cyanogenmod.org/#/c/30502/)

Conflicts:

	packages/SystemUI/res/layout/quick_settings_tile_swagger.xml
	packages/SystemUI/res/values/strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Change-Id: I264e49c4cff9da09e88e7672591a7317135868a8