This follows implementations in Drive, Messages and Calendars. This
system allows Meet to gate some features for users depending on an
authorization server. We provide 2 backends: a local one that always
allows room creation, mimicking the current behaviour, and a DeployCenter
backend, that fetches a "can_create" flag from a remote API. Future
deployment contexts might add new backends, or reuse the API format
of the DeployCenter one.
Sylvain Zimmer