In Av1 packetizer set marker bit with respect of end_of_picture flag

Bug: webrtc:12167
Change-Id: If14fdd7144951c7aa7e48efd390637dd66201bf7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/192791
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32612}
diff --git a/call/rtp_payload_params.cc b/call/rtp_payload_params.cc
index e0b831e..f8d6776 100644
--- a/call/rtp_payload_params.cc
+++ b/call/rtp_payload_params.cc
@@ -36,6 +36,7 @@
                                    absl::optional<int> spatial_index,
                                    RTPVideoHeader* rtp) {
   rtp->codec = info.codecType;
+  rtp->is_last_frame_in_picture = info.end_of_picture;
   switch (info.codecType) {
     case kVideoCodecVP8: {
       auto& vp8_header = rtp->video_type_header.emplace<RTPVideoHeaderVP8>();