Some Halo color options
Unattach halo observer on window state change

Change-Id: Ib817dbb401169cbc7022430f93398181d007810e

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java
Respect mGone at halo initialization

Change-Id: Ife19d02b396910eca55d1b03744fe283f3e61f83

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java