QuietHours Tile (2/2)

Allows user to toggle state of quiet hours

Change-Id: I9d3234b993d250a7d43683b51c1c3254aaec262f

Conflicts:

	res/values/strings.xml
	src/com/android/settings/Settings.java
	src/com/android/settings/cyanogenmod/QuickSettingsUtil.java