Update livekit-rtc/livekit/rtc/room.py

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: davidzhao

livekit-rtc/livekit/rtc/room.py

@@ -666,6 +666,7 @@ def _on_room_event(self, event: proto_room.RoomEvent):
         elif which == "participant_active":
             rp = self._retrieve_remote_participant(event.participant_active.participant_identity)
             if rp:
+                rp._info.state = proto_participant.PARTICIPANT_STATE_ACTIVE
                 self.emit("participant_active", rp)
         elif which == "local_track_published":
             sid = event.local_track_published.track_sid