Settings: Add time-context headers to the notification header [2/2]

Conflicts:
	res/values/probam_strings.xml
	res/xml/notification_drawer.xml
	src/com/android/settings/cyanogenmod/NotificationDrawer.java

Conflicts:
	res/xml/notification_drawer.xml
	src/com/android/settings/slim/NotificationDrawerQsSettings.java