Log audio network adapter decisions in event log.

webrtc/logging/rtc_event_log/rtc_event_log.proto

Index: webrtc/logging/rtc_event_log/rtc_event_log.proto
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log.proto b/webrtc/logging/rtc_event_log/rtc_event_log.proto
index a6d169579659e496379394de86cb9b4fac220b13..7230177f699eabc6a1f17594c51dc4d519c8c877 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log.proto
+++ b/webrtc/logging/rtc_event_log/rtc_event_log.proto
@@ -2,6 +2,8 @@ syntax = "proto2";
 option optimize_for = LITE_RUNTIME;
 package webrtc.rtclog;
 
+import "webrtc/modules/audio_coding/audio_network_adaptor/debug_dump.proto";
+
 enum MediaType {
   ANY = 0;
   AUDIO = 1;
@@ -37,6 +39,7 @@ message Event {
     VIDEO_SENDER_CONFIG_EVENT = 9;
     AUDIO_RECEIVER_CONFIG_EVENT = 10;
     AUDIO_SENDER_CONFIG_EVENT = 11;
+    AUDIO_NETWORK_ADAPTOR_EVENT = 12;
   }
 
   // required - Indicates the type of this event
@@ -65,6 +68,10 @@ message Event {
 
   // optional - but required if type == AUDIO_SENDER_CONFIG_EVENT
   optional AudioSendConfig audio_sender_config = 11;
+
+  // optional - but required if type == AUDIO_NETWORK_ADAPTOR_EVENT
+  optional webrtc.audio_network_adaptor.debug_dump.EncoderRuntimeConfig
+      encoder_runtime_config = 12;
 }
 
 message RtpPacket {