HALO Toggle

Allow the user to switch HALO state by using the toggle. Long pressing toggle will open HALO settings.

Change-Id: Ia9e21f3a605fb237c010fd31b52dacfe381e5d7b

Conflicts:

	packages/SystemUI/res/values/strings_toggles.xml
	packages/SystemUI/src/com/android/systemui/aokp/AokpSwipeRibbon.java
	packages/SystemUI/src/com/android/systemui/statusbar/toggles/ToggleManager.java