Fix for third party installing with HALO active

Change-Id: Ib4226d021804900f0f922cf95bb2dd49696a0d6d
Halo: Add master switch to disable Halo (1/2)

Change-Id: Ifb0f4e8abdce1ed3d4cc4c973edc08794781db64

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
HALO : Effect color

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java

Change-Id: I0a349345ebc05def84fd9dc022b5f1c49733be48