Pass the absolute capture timestamp to rtcp

This pass the absolute capture timestamp at the beginning of the frame
to the rtcp module.

Bug: webrtc:42226041
Change-Id: Iae85a56bfd9d33f7eb9eac3c68961235fe16dc6b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/350202
Commit-Queue: Lionel Koenig <lionelk@webrtc.org>
Reviewed-by: Jakob Ivarsson‎ <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42296}

audio/channel_send.cc

@@ -355,10 +355,7 @@ int32_t ChannelSend::SendRtpAudio(AudioFrameType frameType,
   // Push data from ACM to RTP/RTCP-module to deliver audio frame for
   // packetization.
   if (!rtp_rtcp_->OnSendingRtpFrame(rtp_timestamp_without_offset,
-                                    // Leaving the time when this frame was
-                                    // received from the capture device as
-                                    // undefined for voice for now.
-                                    -1, payloadType,
+                                    absolute_capture_timestamp_ms, payloadType,
                                     /*force_sender_report=*/false)) {
     return -1;
   }