Feed the clock skew to AbsoluteCaptureTimeReceiver in audio receiver.

Bug: webrtc:10739
Change-Id: Ie61582079fb1791954b1929b6a3bf4c9edb7d75e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/207433
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Reviewed-by: Chen Xing <chxg@google.com>
Commit-Queue: Minyue Li <minyue@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33334}

audio/channel_receive.cc

@@ -704,6 +704,12 @@ void ChannelReceive::ReceivedRTCPPacket(const uint8_t* data, size_t length) {
   {
     MutexLock lock(&ts_stats_lock_);
     ntp_estimator_.UpdateRtcpTimestamp(rtt, ntp_secs, ntp_frac, rtp_timestamp);
+    absl::optional<int64_t> remote_to_local_clock_offset_ms =
+        ntp_estimator_.EstimateRemoteToLocalClockOffsetMs();
+    if (remote_to_local_clock_offset_ms.has_value()) {
+      absolute_capture_time_receiver_.SetRemoteToLocalClockOffset(
+          Int64MsToQ32x32(*remote_to_local_clock_offset_ms));
+    }
   }
 }