Revert "HOVER: Theme Engine compatibilities and some resources tweaks"

This reverts commit 0c0c4df000cb60bf45ceb96affd28de724652b04.

Conflicts:
	packages/SystemUI/res/values/mahdi_dimens.xml
	packages/SystemUI/src/com/android/systemui/statusbar/notification/Hover.java
QS: Update heads up tile icons

The bell icon for the "on" state look a bit crappy.
Update them too look more lika a bell.

Screenshot: http://goo.gl/rC1VFD

Change-Id: I9a6a54a5ee9ac0100ebf749ee3babe02eb0e2e32