Settings: Notification Shortcuts (2/2)

Patchset 2: Added hide carrier label toggle, added multi-user support, fixed whitespace, cleanup of code.

Change-Id: I4e6c460289f5375acb419b4f980be15b290d8596

Conflicts:
	res/values/arrays.xml
	res/values/dimens.xml
	res/values/strings.xml
	res/xml/notification_drawer_settings.xml
	src/com/android/settings/Settings.java