Move FecController to RtpVideoSender.

This also moves the packet feedback tracking to RtpVideoSender.

Bug: webrtc:9517
Change-Id: Ifb1ff85051730108a0b0d1dd30f6f8595ad2af6e
Reviewed-on: https://webrtc-review.googlesource.com/c/95920
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Stefan Holmer <stefan@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25019}
diff --git a/call/call.h b/call/call.h
index d8b1b57..4167296 100644
--- a/call/call.h
+++ b/call/call.h
@@ -113,8 +113,7 @@
   virtual void SignalChannelNetworkState(MediaType media,
                                          NetworkState state) = 0;
 
-  virtual void OnTransportOverheadChanged(
-      MediaType media,
+  virtual void OnAudioTransportOverheadChanged(
       int transport_overhead_per_packet) = 0;
 
   virtual void OnSentPacket(const rtc::SentPacket& sent_packet) = 0;