[Settings] Notification services shortcut on expanded status bar

Change-Id: I3ca484b2d748b5ce837deb8da4d4cb54373791f0

Conflicts:
	src/com/android/settings/Settings.java

(cherry picked from commit 07aac54d8cb2cf601e2e3a50a48d7649b9df2634)
Settings: Let users disable the left-corner Keyguard widget

The application widget is a generic icon displayed on the lock screen
that allows a user to launch an activity.  This is part of the Appcast
flow.

Note: The intents necessary to manage this widget is protected by a
system|signature permission.

Change-Id: Ida245b8c096a24ca3d8bb9a09c6af383bf3295cf
Reviewed-on: https://gerrit.nextbit.com:8443/8255
Reviewed-by: chub <chub+gerrit@nextbit.com>
Tested-by: chub <chub+gerrit@nextbit.com>

Conflicts:
	src/com/android/settings/cyanogenmod/LockscreenInterface.java

(cherry picked from commit 52f7e24146533eb03261cb55edfda016e232494d)