Fix the default value for long press on home.

In AOSP the values for this option are different than in CM.
Switch it back to the CM value for opening recent apps.

Change-Id: I0ded218659f6075aad6f178f3cd614fa10d40488
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