Reland of "Log audio network adapter decisions in event log."

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 5231691b552d62b11eccee9e874b517058522388..2791f7f8b4ed555ed9da3e8d3f45ab6b9fa18171 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -140,6 +140,14 @@ class RtcEventLogProxy final : public webrtc::RtcEventLog {
     }
   }
 
+  void LogAudioNetworkAdaptation(
+      const AudioNetworkAdaptor::EncoderRuntimeConfig& config) override {
+    rtc::CritScope lock(&crit_);
+    if (event_log_) {
+      event_log_->LogAudioNetworkAdaptation(config);
+    }
+  }
+
   void SetEventLog(RtcEventLog* event_log) {
     rtc::CritScope lock(&crit_);
     event_log_ = event_log;