transparent statusbar

Currently just uses the same logic/values as the nav bar. We may want to separate those out

  Patch Set 9: Fix whitespace before merge

Change-Id: I6188ebd98684c8775b0447b4e6a1f09ec1a78887
Signed-off-by: Roman Birg <romanbirg@gmail.com>

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

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/NavigationBarView.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarView.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
Status bar transparency