[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 pull request #2 from AOSPA/kitkat

AOSPA