Revert "Heads Up Toggle [1/2]"

This reverts commit 4b805e661fc40227426d34b7275159727b78d37c.

Conflicts:
	packages/SystemUI/src/com/android/systemui/quicksettings/HeadsupTile.java
Heads up: Update snooze drawable:

- Use a flat background, icon and "text"
- Use the background color from notifications for the snooze background, too,
  (especially the pressed background, no big difference for normal background)
- Make the drawables larger,
  (in my opinion the drawables are a bit to small, so use a smaller transparent "border")

Change-Id: I550d04ef618530412e9c8b3927fd0a266277e497