Add notifcation row backround transparency - SlimBean (1/2)
-also allow different background transparency without wallpaper

Change-Id: I971f4f239300ad73a595cee69acc4d0a1a219fe3

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
BG Trans