message: Make SEA to be codec agnostic.
  Cr-Commit-Position: refs/heads/master@{#32593}
diff: @@ -240,10 +240,6 @@ int SimulcastEncoderAdapter::InitEncode(
  RTC_DCHECK_LT(lowest_resolution_stream_index, number_of_streams);
  RTC_DCHECK_LT(highest_resolution_stream_index, number_of_streams);
  - const SdpVideoFormat format(
  - codec_.codecType == webrtc::kVideoCodecVP8 ? "VP8" : "H264",
  - video_format_.parameters);
  -
  for (int i = 0; i < number_of_streams; ++i) {
  // If an existing encoder instance exists, reuse it.
  // TODO(brandtr): Set initial RTP state (e.g., picture_id/tl0_pic_idx) here,
  @@ -253,10 +249,10 @@ int SimulcastEncoderAdapter::InitEncode(
  encoder = std::move(stored_encoders_.top());
  stored_encoders_.pop();
  } else {
  - encoder = primary_encoder_factory_->CreateVideoEncoder(format);
  + encoder = primary_encoder_factory_->CreateVideoEncoder(video_format_);
  if (fallback_encoder_factory_ != nullptr) {
  encoder = CreateVideoEncoderSoftwareFallbackWrapper(
  - fallback_encoder_factory_->CreateVideoEncoder(format),
  + fallback_encoder_factory_->CreateVideoEncoder(video_format_),
  std::move(encoder),
  i == lowest_resolution_stream_index &&
  prefer_temporal_support_on_base_layer_);
  