move some log spilling below DEBUG

Change-Id: I5a8b269782a733bdb75cf38120ae255995f75e2c
protect unregisterReceiver method
unregister the same twice will lead to an IllegalArgumentException

Change-Id: Ie29065d8c1ae3ad8d1dfdebeaf0b17f052ba8fe5
ClockActions: Dismiss Keyguard

Change-Id: I6542a0bd6bfb83790a5c67bd7eba82a31195250e