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

webrtc/call/audio_send_stream.h

Index: webrtc/call/audio_send_stream.h
diff --git a/webrtc/call/audio_send_stream.h b/webrtc/call/audio_send_stream.h
index fa5b5eecc8d20c5fa57116b7b1aba8c5bc7bd887..3ff520bb9cc69fee000011766ca5383a74d72ae2 100644
--- a/webrtc/call/audio_send_stream.h
+++ b/webrtc/call/audio_send_stream.h
@@ -18,6 +18,7 @@
 #include "webrtc/api/audio_codecs/audio_encoder_factory.h"
 #include "webrtc/api/audio_codecs/audio_format.h"
 #include "webrtc/api/call/transport.h"
+#include "webrtc/common_types.h"
 #include "webrtc/config.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/typedefs.h"
@@ -59,6 +60,7 @@ class AudioSendStream {
     float residual_echo_likelihood = -1.0f;
     float residual_echo_likelihood_recent_max = -1.0f;
     bool typing_noise_detected = false;
+    ANAStats ana_statistics;
   };
 
   struct Config {