[th/fix-introspection_active_connection-for-loopback] connection: ignore external connections in @introspection_active_connection
Test @introspection_active_connection calls "contrib/gi/network_check.py" which checks that there are an expected number of active connections.
We will soon add support for loopback device, so usually we will see one activation
DEVICE TYPE STATE CONNECTION
lo loopback connected (externally) loLet's just ignore all EXTERNAL activations.
this is for NetworkManager!1332 (merged)