Framework: Quick Settings customization (Part 2 of 2) WIP!

This commit will alow loading the Quick Settings tiles layout from
a layout that is configured in Settings.

Patchset 3 - Restore Settings tile to AOSP location

Change-Id: Id4e4353dee68b8ca434dfa64d1f88737792a2e28

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java