test: Skip test_notification_daemon with AppArmor profile

Ubuntu 25.10 introduces an AppArmor profile for notify-send, which only
allows it to talk to the real daemon.

https://launchpad.net/bugs/2121092

Author: martinpitt

tests/test_notification_daemon.py

@@ -28,6 +28,7 @@
 
 
 @unittest.skipUnless(notify_send_version, "notify-send not installed")
+@unittest.skipIf(os.path.exists('/etc/apparmor.d/notify-send'), "AppArmor profile for notify-send active")
 class TestNotificationDaemon(dbusmock.DBusTestCase):
     """Test mocking notification-daemon"""