[2/2] Prepare NotificationManagerService for new format

* Needed for blacklisting

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
[2/2] Add support for Peek app

Disable built in peek when Peek app is installed. Enable it again on app's unistall.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Merge branch 'kitkat' of https://github.com/AOSPA/android_packages_apps_Settings into legacy2

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

Change-Id: I1b058750e91bb5e41dd70a7796278e20d5618436