KeyguardViewMediator: Play lock screen sound sooner

When the screen is locked, there is a long pause before the lock
sound actually plays. This makes that sound happen much sooner.

Change-Id: I62547a183d68b93a33651c4078b5788d324055a9
fb: Quiet hours 1/2 thanks cm

and added multiuser support

Change-Id: I38e8560297099629aed94ee001da7f1ebaa04dac

Conflicts:
	core/java/android/provider/Settings.java