PrivacyGuard: Specify a default value in Settings.getInt method call

* While privacy guard is enabled by default, the default value specified
  here is returned only when the setting is not defined or not an integer.

Change-Id: Iaedffcc76a23a310aa7915f6a42ccce83ba5d2a6
AppOps/Privacy Guard: Fix up misaligned switches.

Change-Id: Ic9e1e09ac911e552599f7bca6fb71b2808548f1d
Make Privacy Guard a first class citizen in the Settings app.

Change-Id: Ie45e21cfa5190307923edf65f8ff5356fa305d70