DO NOT MERGE Workaround for KeyguardLock problem

* The device policies that enforce the use of a device PIN or password
  can be sidestepped by apps that implement KeyguardManager.KeyguardLock
* This renders the policies unuseable
* To prevent this, the email app now scans for any packages holding the
  DISABLE_KEYGUARD permission.  The existence of any non-system app
  with this permission will put all security-enabled EAS accounts into
  a security hold, and post a dialog describing the problem.
* The user must uninstall any such app(s) in order to sync their EAS data.

Bug: 2737842
Change-Id: I4c96d76b12d9242b5c755dd60d7578a825fae597
2 files changed