Called by users to attach the media stream to a `GdkSurface` they manage.
The stream can then access the resources of surface for its rendering purposes. In particular, media streams might want to
create a `GdkGLContext` or sync to the `GdkFrameClock`.
Whoever calls this function is responsible for calling [[email protected]] before either the stream or surface
get destroyed.
Multiple calls to this function may happen from different users of the video, even with the same surface. Each of these
calls must be followed by its own call to [[email protected]].
It is not required to call this function to make a media stream work.
| this |
a `GtkMediaStream` |
| surface |
a `GdkSurface` |