Add support to audioproc_f for running the residual echo detector and producing an echo likelihood …

webrtc/modules/audio_processing/audio_processing_impl.cc

Index: webrtc/modules/audio_processing/audio_processing_impl.cc
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index f63cb206b5c6aaf72a4bc30b47ebd0b6c7c8680b..90b1f2d6319d72f1ad154f49cea516d7d27e3c6a 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -1496,6 +1496,8 @@ AudioProcessing::AudioProcessingStatistics AudioProcessingImpl::GetStatistics()
         metrics.echo_return_loss_enhancement);
     stats.residual_echo_return_loss.Set(metrics.residual_echo_return_loss);
   }
+  stats.residual_echo_likelihood =
+      private_submodules_->residual_echo_detector->echo_likelihood();
   public_submodules_->echo_cancellation->GetDelayMetrics(
       &stats.delay_median, &stats.delay_standard_deviation,
       &stats.fraction_poor_delays);