message: red: fix SendCodecSpec == operator
  The == operator needs to take the red_payload_type into account as
  well.
  Cr-Commit-Position: refs/heads/master@{#31869}
diff: @@ -88,6 +88,7 @@ bool AudioSendStream::Config::SendCodecSpec::operator==(
  if (nack_enabled == rhs.nack_enabled &&
  transport_cc_enabled == rhs.transport_cc_enabled &&
  cng_payload_type == rhs.cng_payload_type &&
  + red_payload_type == rhs.red_payload_type &&
  payload_type == rhs.payload_type && format == rhs.format &&
  target_bitrate_bps == rhs.target_bitrate_bps) {
  return true;
  