Expose each monitor state as two booleans, not to expose the whole flags Related-to: GNOME/gnome-control-center#909 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1952>
Place the XML files in data/dbus-interfaces. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2126>