Added forced zero AEC output after call startup and echo path changes

webrtc/modules/audio_processing/aec3/echo_remover.cc

 /*
  *  Copyright (c) 2017 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.
  */
 #include "webrtc/modules/audio_processing/aec3/echo_remover.h"
@@ skipping 164 matching lines @@
   residual_echo_estimator_.Estimate(output_selector_.UseSubtractorOutput(),
                                     aec_state_, render_buffer, S2_linear, Y2,
                                     &R2);
 
   // Estimate the comfort noise.
   cng_.Compute(aec_state_, Y2, &comfort_noise, &high_band_comfort_noise);
 
   // A choose and apply echo suppression gain.
   suppression_gain_.GetGain(E2, R2, cng_.NoiseSpectrum(),
                             aec_state_.SaturatedEcho(), x, y->size(),
-                            &high_bands_gain, &G);
+                            aec_state_.ForcedZeroGain(), &high_bands_gain, &G);
   suppression_filter_.ApplyGain(comfort_noise, high_band_comfort_noise, G,
                                 high_bands_gain, y);
 
   // Update the metrics.
   metrics_.Update(aec_state_, cng_.NoiseSpectrum(), G);
 
   // Debug outputs for the purpose of development and analysis.
   data_dumper_->DumpRaw("aec3_N2", cng_.NoiseSpectrum());
   data_dumper_->DumpRaw("aec3_suppressor_gain", G);
   data_dumper_->DumpWav("aec3_output",
@@ skipping 23 matching lines @@
                         aec_state_.SaturatedCapture() ? 1 : 0);
 }
 
 }  // namespace
 
 EchoRemover* EchoRemover::Create(int sample_rate_hz) {
   return new EchoRemoverImpl(sample_rate_hz);
 }
 
 }  // namespace webrtc