Revert "Remove Hover button from expanded status bar"

This reverts commit 97394fb24c517aa531c2b4885b94df205bf362e6.
Revert "Add Hover tile"

This reverts commit 5f174772343c76027e9e6a4b2c087b8c737ef089.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java
Headsup: Fix tile derp