PrivacyGuard: add missing @hides to method definitions

Causing DroidDoc compile errors, this fixes it by adding
a @hide to the respective function definitions.

Change-Id: I27675cd6a75fcc1535c812566e5b9098b11335e1
KeyGuard: fix the @hide formatting in DevicePolicyManager

Missing a * :D

Change-Id: Id85293804d98aada925b82cae51849c5fdc2f964
Merge branch 'cm-11.0' into martincz