Whether the model renders the avatar in this session.
OptionalReasonWhy the session runs audio-only, when it asked for an avatar and was not granted one.
OptionalReasontrue when the JSON named a reason this version doesn't know, such as a newer server's: Reason is then absent,
and Requested and Granted stand. Absent otherwise.
Whether the session asked for an avatar: the voiced agent's video setting is on, or the call picked one.
A RealtimeAvatarStatus as ParseRealtimeAvatarStatus reads it back from JSON.