Port forward: HALO tile (1/2)

PS2 - fix the incomplete handler
PS3 - final fixes

Change-Id: I5d588959b4382fb9b9a11d25f9e7bb76a8e55d7a

Conflicts:
	packages/SystemUI/res/drawable-hdpi/ic_qs_halo_off.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_halo_on.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_halo_off.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_halo_on.png
	packages/SystemUI/res/values/strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java