Add Reboot system / Reboot recovery into Power Widgets (1/2)
This commit complements:
"Add reboot tile to QS (1/2) WIP
- Still need to colapse expanded status bar and show reboot message

Ported, with some adaptations, form Slim Roms

Change-Id: Iabed00f7697fe89fedb9904a69b7dea25efc3c7d
Author: Kufikugel"

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/powerwidget/PowerWidget.java