Add network cost as part of the connection comparison.

talk/app/webrtc/java/jni/androidnetworkmonitor_jni.cc

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 312 matching lines @@
   network_info_by_handle_.clear();
   for (NetworkInformation network : network_infos) {
     OnNetworkConnected_w(network);
   }
 }
 
 rtc::AdapterType AndroidNetworkMonitor::GetAdapterType(
     const std::string& if_name) {
   auto iter = adapter_type_by_name_.find(if_name);
   if (iter == adapter_type_by_name_.end()) {
+    LOG(LS_WARNING) << "Get adapter type for an unknown interface: " << if_name;
     return rtc::ADAPTER_TYPE_UNKNOWN;
   }
   return iter->second;
 }
 
 rtc::NetworkMonitorInterface*
 AndroidNetworkMonitorFactory::CreateNetworkMonitor() {
   return new AndroidNetworkMonitor();
 }
 
@@ skipping 32 matching lines @@
 JOW(void, NetworkMonitor_nativeNotifyOfNetworkDisconnect)(
     JNIEnv* jni, jobject j_monitor, jlong j_native_monitor,
     jint network_handle) {
   AndroidNetworkMonitor* network_monitor =
       reinterpret_cast<AndroidNetworkMonitor*>(j_native_monitor);
   network_monitor->OnNetworkDisconnected(
       static_cast<NetworkHandle>(network_handle));
 }
 
 }  // namespace webrtc_jni