Notification Background redo the entire thing (1/2) FW side.

Removed added java file (NotificationWallper).
Moved everything on PanelView setting a content observer to handle changes when they happen removing the need for killing systemui.
Added a separate settings string to handle the color fill option making everything int's simplify's the process.

Signed-off-by: travp624 <travp624@gmail.com>