HALO: Circle color

Change-Id: I8d0ec55322ae61b1357f7190bcf73d73d42531b4

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/res/drawable-hdpi/halo_bg.png
	packages/SystemUI/res/drawable-xhdpi/halo_bg.png
	packages/SystemUI/res/layout/halo_bubble.xml
	packages/SystemUI/src/com/android/systemui/statusbar/halo/HaloProperties.java