Conference: bad videomuted and audiomuted initial states

When creating a conference from a audio and/or video muted call, the resulting audioMuted and videoMuted flags aren't set correctly.

changed the description

assigned to @agsantos and @mchibani1

added SprintIn progress label

added SprintTo review label and removed SprintIn progress label

https://review.jami.net/c/ring-daemon/+/18742

mentioned in commit 1cf24333

added SprintDone label and removed SprintTo review label

closed

removed SprintDone label

mentioned in commit d02e768e