Add local capture clock offset to video RtpPacketInfos

Start to save local capture clock offset for video. This is part of a effort to add End 2 End metric on Android.

Bug: None
Change-Id: Icd6e567faf66f1dc200d8661344708356bda470b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/320300
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Olov Brändström <brandstrom@google.com>
Cr-Commit-Position: refs/heads/main@{#40764}

video/rtp_video_stream_receiver2.cc

diff --git a/video/rtp_video_stream_receiver2.cc b/video/rtp_video_stream_receiver2.cc
index 70c11e5..2890b9b 100644
--- a/video/rtp_video_stream_receiver2.cc
+++ b/video/rtp_video_stream_receiver2.cc
@@ -562,7 +562,13 @@
           // Assume frequency is the same one for all video frames.
           kVideoPayloadTypeFrequency,
           rtp_packet.GetExtension<AbsoluteCaptureTimeExtension>()));
-
+  if (packet_info.absolute_capture_time().has_value()) {
+    packet_info.set_local_capture_clock_offset(
+        capture_clock_offset_updater_.ConvertsToTimeDela(
+            capture_clock_offset_updater_.AdjustEstimatedCaptureClockOffset(
+                packet_info.absolute_capture_time()
+                    ->estimated_capture_clock_offset)));
+  }
   RTPVideoHeader& video_header = packet->video_header;
   video_header.rotation = kVideoRotation_0;
   video_header.content_type = VideoContentType::UNSPECIFIED;