DYNAMIC_GROUPS (Property Type 0x30) is a Track Property.
The allowed values are 0 or 1. When the value is 1, it indicates
that the subscriber can request the Original Publisher to start a new Group
by including the NEW_GROUP_REQUEST parameter in PUBLISH_OK or REQUEST_UPDATE
for this Track. If an endpoint receives a value larger than 1, it MUST close
the session with PROTOCOL_VIOLATION.
If omitted, the value is 0.