HALO NEW ICON SET (XHDPI ONLY!)

Change-Id: I83f6bba92c14688a98c09a4722e195b6b01ce93b

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