GB Actions: Quiet Hours shortcut extended
Added dedicated shortcut for turning on AUTO mode.
Essential in case there's no tile or no Quick Settings (e.g. Android 4.1).
Unlock ring targets: prevent broadcasted actions from running twice
Explicit call to doFinish() caused the last action to run again.
Unset active target before calling doFinish()
GB Actions: added alternative launch method for Google Now action
Needed when there's no navigation bar thus no search panel (navbar ring).

Revised by bgcngm:
- alternative only available for Android 4.2+ since UserHandle class was
only added in API level 17