WIP: gdesktopappinfo: also use document portal for Snap applications
In addition to the launch_uris_with_dbus() code path, we do this for launch_uris_with_spawn, since Snap desktop file names will not necessarily be valid D-Bus names.
In addition to the launch_uris_with_dbus() code path, we do this for launch_uris_with_spawn, since Snap desktop file names will not necessarily be valid D-Bus names.