Settings: quiet hours cleanup and fixes

-use sendBroadcastsUser to silence log
-always kill services first on reschedule
that should fix the notification staying on sometimes
http://jira.omnirom.org/browse/OMNI-896

Change-Id: I52f34ae404b34f22d01bdc283ed50f2e3ae92560
Merge pull request #8 from omnirom/android-4.4

Settings: quiet hours cleanup and fixes