call: handle rotation and keyframe per stream

Since multistream, we can handle several video streams with different
rotations and keyframe requests. the previous callback only managed
one stream.
To identify a stream, we use what is specified in RFC 5168 that we
already use and add a stream_id string when necessary:
https://datatracker.ietf.org/doc/html/rfc5168#page-6
If stream_id is empty, we apply the rotation/request to all streams.

jami-project#1429

Change-Id: I8ca8480d128b0a5773e67409e467e26e7726dec4