HALO fix speech fade out

Change-Id: I3e8cccb2b2884824ab1f3193ecadced4e014211e
HALO smoother operation

Change-Id: I8c906e969077c826f168a2c452d56d2ce49f78a8

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