hybrid colors hotfixes (1/2)

Part 1:
- does not start two conflicting animations at the same time
- cleaner separation of color invalidation
- cut out color gray state - will be replaced by another solution

Part 2 will contain new drawables that can reflect a google-
service outage without additional code

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