Allow ANA to receive RPLR (recoverable packet loss rate) indications

webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h b/webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h
index 14ddbca0a781e2bfd257843291d185540739e95c..0ad4a1e5f3b510380ed53da90666a40821fdf8c7 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/include/audio_network_adaptor.h
@@ -26,6 +26,8 @@ class AudioNetworkAdaptor {
     ~EncoderRuntimeConfig();
     rtc::Optional<int> bitrate_bps;
     rtc::Optional<int> frame_length_ms;
+    // Note: This is what we tell the encoder. It doesn't have to reflect
+    // the actual NetworkMetrics; it's subject to our decision.
     rtc::Optional<float> uplink_packet_loss_fraction;
     rtc::Optional<bool> enable_fec;
     rtc::Optional<bool> enable_dtx;
@@ -43,6 +45,9 @@ class AudioNetworkAdaptor {
   virtual void SetUplinkPacketLossFraction(
       float uplink_packet_loss_fraction) = 0;
 
+  virtual void SetUplinkRecoverablePacketLossFraction(
+      float uplink_recoverable_packet_loss_fraction) = 0;
+
   virtual void SetRtt(int rtt_ms) = 0;
 
   virtual void SetTargetAudioBitrate(int target_audio_bitrate_bps) = 0;