The intention of the code is to only expose actually plugged in
devices rather than network mounts, but the existing heuristics are
based on GVolume and simply assume a local mount where there's no
associated volume. Fill that gap by querying the ::remote filesystem
attribute in that case.
https://gitlab.gnome.org/GNOME/gnome-shell-extensions/issues/53
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/27>
(cherry picked from commit 7d6670ce3c)