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

webrtc/voice_engine/channel.cc

Index: webrtc/voice_engine/channel.cc
diff --git a/webrtc/voice_engine/channel.cc b/webrtc/voice_engine/channel.cc
index 5732e8e52349a8737be31983c12a7e69d33beec1..42db00f29aa79c29a0240dab64e32641a1ed1be3 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -2893,6 +2893,10 @@ void Channel::GetDecodingCallStatistics(AudioDecodingCallStats* stats) const {
   audio_coding_->GetDecodingCallStatistics(stats);
 }
 
+AudioEncoder::AudioEncoderStats Channel::GetAudioEncoderStatistics() const {
+  return audio_coding_->GetAudioEncoderStatistics();
+}
+
 uint32_t Channel::GetDelayEstimate() const {
   rtc::CritScope lock(&video_sync_lock_);
   return audio_coding_->FilteredCurrentDelayMs() + playout_delay_ms_;