message: Audio coding: Don't choke when RTP timestamp rate > sample rate
  Cr-Commit-Position: refs/heads/master@{#27998}
diff: @@ -328,13 +328,13 @@ int32_t AudioCodingModuleImpl::Encode(const InputData& input_data) {
  // Scale the timestamp to the codec's RTP timestamp rate.
  uint32_t rtp_timestamp =
  - first_frame_ ? input_data.input_timestamp
  + first_frame_
  + ? input_data.input_timestamp
  : last_rtp_timestamp_ +
  - rtc::CheckedDivExact(
  - input_data.input_timestamp - last_timestamp_,
  - static_cast<uint32_t>(rtc::CheckedDivExact(
  - encoder_stack_->SampleRateHz(),
  - encoder_stack_->RtpTimestampRateHz())));
  + rtc::dchecked_cast<uint32_t>(rtc::CheckedDivExact(
  + int64_t{input_data.input_timestamp - last_timestamp_} *
  + encoder_stack_->RtpTimestampRateHz(),
  + int64_t{encoder_stack_->SampleRateHz()}));
  last_timestamp_ = input_data.input_timestamp;
  last_rtp_timestamp_ = rtp_timestamp;
  first_frame_ = false;
  