Base: add Location Flip Tile

Front
stay with default

Back
you can choose
between OFF, DEVICE ONLY, BATTERY, and HIGH ACCURACY

Collapse Panel if Location Mode = Battery or High Accuracy
(need by Google confirmation)

Conflicts:
	packages/SystemUI/res/values/custom_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java

Change-Id: If070a23fa036fec2e1ac28fd342113c8e6564efe