Add new ANA stats to GetStats() to count the number of actions taken by each controller.

webrtc/modules/audio_coding/audio_network_adaptor/mock/mock_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 22 matching lines @@
 
   MOCK_METHOD1(SetTargetAudioBitrate, void(int target_audio_bitrate_bps));
 
   MOCK_METHOD1(SetOverhead, void(size_t overhead_bytes_per_packet));
 
   MOCK_METHOD0(GetEncoderRuntimeConfig, AudioEncoderRuntimeConfig());
 
   MOCK_METHOD1(StartDebugDump, void(FILE* file_handle));
 
   MOCK_METHOD0(StopDebugDump, void());
+
+  MOCK_CONST_METHOD0(GetStats, ANAStats());
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_MOCK_MOCK_AUDIO_NETWORK_ADAPTOR_H_