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
Allow disabling the privacy guard notifcation

Change-Id: I060139f75edb63572f9c3922e56ee871e765c02a
Set Privacy Guard to ON by default