Show policy transparent of "Force stop" when no DO

PackageManager.isPackageStateProtected() is moving to permission based,
so force stop button can also be protected when no DeviceOwner.

The ActivityManger side has already handled correctly, no Settings UI
side need to show a device policy transparent dialog.

Fix: 319579347
Test: manual - Force stop on AppInfo
Test: unit test
Change-Id: I4432dcb798a0cfcbb6bfc8b30c9191dd91b980a2