Settings: Migrate stats opt out to global settings.

Control newly introduced global setting

Change-Id: Iea22206cd8ac8bf7d45e4b7dabfb9f0d1e602e0e
Merge remote-tracking branch 'upstream/cm-11.0' into cm-11.0

Conflicts:
	src/com/android/settings/cmstats/AnonymousStats.java
	src/com/android/settings/cmstats/ReportingServiceManager.java
	src/com/android/settings/cmstats/Utilities.java