Fill a new SessionProperties member "forcedVideoCodecResolved" to
contain the resolved value of "forcedVideoCodec", once the new
MEDIA_SERVER_PREFERRED has been taken into account and translated into
the appropriate option for each media server.
The logic to decide how to translate MEDIA_SERVER_PREFERRED into a
concrete forcedVideoCodec value is placed once in the REST entry point
of session creation (SessionRestController.java). Afterwards,
SessionProperties is just used as a simple storage for all session
features, and serialized / passed around between server and client.
MEDIA_SERVER_PREFERRED: A recommended choice is done for you,
based on the media server that is currently in use.
This is the default setting, and is equivalent to these values:
- For *mediasoup*, `NONE` is selected.
- For *Kurento*, `VP8` is selected.