message: in libaom decoder use public control function instead of internal one
  to unblock rolling new version where private function is no longer available
  Cr-Commit-Position: refs/heads/master@{#31427}
diff: @@ -127,7 +127,7 @@ int32_t LibaomAv1Decoder::Decode(const EncodedImage& encoded_image,
  // Return decoded frame data.
  int qp;
  - ret = aom_codec_control_(&context_, AOMD_GET_LAST_QUANTIZER, &qp);
  + ret = aom_codec_control(&context_, AOMD_GET_LAST_QUANTIZER, &qp);
  if (ret != AOM_CODEC_OK) {
  RTC_LOG(LS_WARNING) << "LibaomAv1Decoder::Decode returned " << ret
  << " on control AOME_GET_LAST_QUANTIZER.";
  