BAMControl: Notification custom wallpaper alpha and wallpaper. 1/2

Conflicts:

	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationWallpaper.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Signed-off-by: iGio90 <giovanni.rocca.90@gmail.com>