Forward port "Add option to hide AlarmClock Icon in StatusBar"

From http://review.cyanogenmod.org/#/c/29106/

Change-Id: I757fcce947536ac78a954eda72470f507c6ddb23
DeskClock : Fix alarm statusbar icon visibility

Change-Id: Ib82aa6289ca6b54382b322a787f812964f191ce8