Revert "transparent statusbar"

This reverts commit 075f10f28908a501bb1cbf34e59195f0fbf1d8c3.

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/BackgroundAlphaColorDrawable.java
	packages/SystemUI/src/com/android/systemui/statusbar/NavigationBarView.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java