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

webrtc/voice_engine/channel_proxy.cc

Index: webrtc/voice_engine/channel_proxy.cc
diff --git a/webrtc/voice_engine/channel_proxy.cc b/webrtc/voice_engine/channel_proxy.cc
index cdd4b6624ff53612ffacfceeebecf37d5dd98c1c..841a80a0620c989b3613e40bcfded84df956a935 100644
--- a/webrtc/voice_engine/channel_proxy.cc
+++ b/webrtc/voice_engine/channel_proxy.cc
@@ -144,6 +144,11 @@ AudioDecodingCallStats ChannelProxy::GetDecodingCallStatistics() const {
   return stats;
 }
 
+AudioEncoder::AudioEncoderStats ChannelProxy::GetAudioEncoderStatistics()
+    const {
+  return channel()->GetAudioEncoderStatistics();
+}
+
 int ChannelProxy::GetSpeechOutputLevel() const {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   return channel()->GetSpeechOutputLevel();