Add RegisterAudioSendPayload() method

In preparation of removing CodecInst.

Bug: webrtc:7626
Change-Id: I8955d17dbb3ec15177e505ae420376b542d48410
Reviewed-on: https://webrtc-review.googlesource.com/c/113306
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25919}
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl.h b/modules/rtp_rtcp/source/rtp_rtcp_impl.h
index 8e9751d..e044823 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl.h
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl.h
@@ -64,7 +64,11 @@
   // Sender part.
 
   int32_t RegisterSendPayload(const CodecInst& voice_codec) override;
-
+  void RegisterAudioSendPayload(int payload_type,
+                                absl::string_view payload_name,
+                                int frequency,
+                                int channels,
+                                int rate) override;
   void RegisterVideoSendPayload(int payload_type,
                                 const char* payload_name) override;