The perf scripts that can be used to script the gnome-shell UI
for testing are sufficiently separate from the rest of the code
base to allow porting them to ESM modules before the rest of
the code base.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2812>
We are about to port the helper proxy to GApplication, which means
that it will establish a display connection before exporting its
D-Bus name. That means that the compositor must be able to respond
to a roundtrip request to avoid locking, so don't block on the proxy
becoming available.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2733>
