power menu: reboot and screenshot

Conflicts:
	policy/src/com/android/internal/policy/impl/GlobalActions.java
	services/java/com/android/server/power/ShutdownThread.java
	services/java/com/android/server/wm/WindowManagerService.java
Revert "power menu: reboot and screenshot"

This reverts commit b6ebfe3f4be16a8e36cb474bd92895a6f21c1536.