Merge "Disallow prepare()-ing over an always on VPN app" into nyc-dev

            return true;

        }

        // Check if the caller is authorized.

        // Stop an existing always-on VPN from being dethroned by other apps.

        if (getAlwaysOnPackage() != null) {

            return false;

        }

        // Check that the caller is authorized.

        enforceControlPermission();

        prepareInternal(newPackage);