Adding APM configuration in AEC dump.

webrtc/modules/audio_processing/gain_control_impl.h

Index: webrtc/modules/audio_processing/gain_control_impl.h
diff --git a/webrtc/modules/audio_processing/gain_control_impl.h b/webrtc/modules/audio_processing/gain_control_impl.h
index d64894367c9de145e073e5db04e099ee50e0c1da..412e3df2b47e558c90788223bb9f736c7e3dfd33 100644
--- a/webrtc/modules/audio_processing/gain_control_impl.h
+++ b/webrtc/modules/audio_processing/gain_control_impl.h
@@ -39,18 +39,19 @@ class GainControlImpl : public GainControl,
   bool is_enabled() const override;
   int stream_analog_level() override;
 
+  bool is_limiter_enabled() const override;
+  Mode mode() const override;
+
  private:
   // GainControl implementation.
   int Enable(bool enable) override;
   int set_stream_analog_level(int level) override;
   int set_mode(Mode mode) override;
-  Mode mode() const override;
   int set_target_level_dbfs(int level) override;
   int target_level_dbfs() const override;
   int set_compression_gain_db(int gain) override;
   int compression_gain_db() const override;
   int enable_limiter(bool enable) override;
-  bool is_limiter_enabled() const override;
   int set_analog_level_limits(int minimum, int maximum) override;
   int analog_level_minimum() const override;
   int analog_level_maximum() const override;