Frameworks: Pimp up Notification Labels Hide [1/2]

This adds fine grain priorities to hide the labels in the notification
drawer in the following ways:

- Show all Labels
- Hide Carrier Label
- Hide WiFI Lable
- Hide all Labels

PS:
- fix codestyle

Change-Id: I8be92bdf27ba017b6aec3c2b311a83758cded6ff
Signed-off-by: scott <scott@ubuntu>

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