Handle cancellation of the 'enabling PrivacyGuard' alert box.

I noticed that the option could remain ticked but not actually enabled
if the alert box is cancelled.

Change-Id: If9a4e88641a5e4283d6ea16c17ca4461841580e3
Merge "Handle cancellation of the 'enabling PrivacyGuard' alert box." into cm-10.1
Merge remote-tracking branch 'cm/cm-10.1' into cm-10.1