Lockscreen: See through (2/2)

Add the ability to see through lockscreen.
Adapted to kitkat from jellybean by @BigBrother1984

Signed-off-by: D4rKn3sSyS <jesdga95@gmail.com>
Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Change-Id: Ife993ffe0833be98fe582146fc071f339445bbc5
Lockscreen blur

Change-Id: Id6d16e8a74b225ac6d4a8b45934118efb528e0f8