NavigationBar and StatusBar backaground, transparency and colors (2/2)

Thanks to Kufikugel and SlimRom Team

Change-Id: Ia710fb0881e9b85f26e4fa7ceb8ad94265b5001c

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

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java