framework: Add compass tile (1/2)

Add a compass tile to quick settings.
Clicking on it enables the sensor and clicking again disables it.

Screenshot: http://goo.gl/2frdpy

Conflicts:

	core/java/com/android/internal/util/cm/QSConstants.java
	core/java/com/android/internal/util/cm/QSUtils.java
	packages/SystemUI/res/values/cm_arrays.xml
	packages/SystemUI/res/values/cm_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java

Change-Id: I67a6e7a57ce4d7aeb71b25c92913e004bf4e7a7c