message: http3: add a stub handle_connection_closed()
diff: @@ -410,10 +410,7 @@ impl Http3Connection {
  ConnectionEvent::SendStreamCreatable { stream_type } => {
  self.handle_stream_creatable(stream_type)?
  }
  - ConnectionEvent::ConnectionClosed { .. } => {
  - // Peer closed the connection.
  - // TODO: Dragana, what should we do here?
  - }
  + ConnectionEvent::ConnectionClosed { .. } => self.handle_connection_closed()?,
  }
  }
  Ok(())
  @@ -538,6 +535,10 @@ impl Http3Connection {
  Ok(())
  }
  + fn handle_connection_closed(&mut self) -> Res<()> {
  + Ok(())
  + }
  +
  fn read_stream_client(&mut self, stream_id: u64, unblocked: bool) -> Res<bool> {
  if self.role() != Role::Client {
  return Ok(false);
  