Add plumbing of RtpPacketInfos to each VideoFrame as input for SourceTracker.

This change adds the plumbing of RtpPacketInfo from RtpVideoStreamReceiver::OnRtpPacket() to VideoReceiveStream::OnFrame() for video. It is a step towards replacing the non-spec compliant ContributingSources that updates itself at packet-receive time, with the spec-compliant SourceTracker that will update itself at frame-delivery-to-track time.

Bug: webrtc:10668
Change-Id: Ib97d430530c5a8487d3b129936c7c51e118889bd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/139891
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Chen Xing <chxg@google.com>
Cr-Commit-Position: refs/heads/master@{#28332}

modules/video_coding/codecs/multiplex/multiplex_decoder_adapter.cc

@@ -262,6 +262,7 @@ void MultiplexDecoderAdapter::MergeAlphaImages(
                                 .set_timestamp_us(0)
                                 .set_rotation(decoded_image->rotation())
                                 .set_id(decoded_image->id())
+                                .set_packet_infos(decoded_image->packet_infos())
                                 .build();
   decoded_complete_callback_->Decoded(merged_image, decode_time_ms, qp);
 }