A couple of improvements to edit mode

* Fadeout selected dragging item to 5% opacity
* Disable hovering on touch

Change-Id: Ie2be81f83e72c83071577a2e56b90160dc701370

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsBasicTile.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java