Relanding of "Adding debug dump to audio network adaptor."

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

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 25 matching lines @@
     rtc::Optional<size_t> num_channels;
   };
 
   virtual ~AudioNetworkAdaptor() = default;
 
   virtual void SetUplinkBandwidth(int uplink_bandwidth_bps) = 0;
 
   virtual void SetUplinkPacketLossFraction(
       float uplink_packet_loss_fraction) = 0;
 
+  virtual void SetRtt(int rtt_ms) = 0;
+
   virtual void SetReceiverFrameLengthRange(int min_frame_length_ms,
                                            int max_frame_length_ms) = 0;
 
   virtual EncoderRuntimeConfig GetEncoderRuntimeConfig() = 0;
 
   virtual void StartDebugDump(FILE* file_handle) = 0;
+
+  virtual void StopDebugDump() = 0;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_INCLUDE_AUDIO_NETWORK_ADAPTOR_H_