Reset the BWE when the network changes

webrtc/media/engine/webrtcvoiceengine.cc

Index: webrtc/media/engine/webrtcvoiceengine.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine.cc b/webrtc/media/engine/webrtcvoiceengine.cc
index ae2518b73af9d74feed8a847d51c4f2f9b60ab9e..e5dca4c9fe4a28181bf946c0e583112398f43339 100644
--- a/webrtc/media/engine/webrtcvoiceengine.cc
+++ b/webrtc/media/engine/webrtcvoiceengine.cc
@@ -2334,6 +2334,11 @@ void WebRtcVoiceMediaChannel::OnRtcpReceived(
   }
 }
 
+void WebRtcVoiceMediaChannel::OnNetworkChanged(int local_net_id,
+                                               int remote_net_id) {
+  call_->OnNetworkChanged(local_net_id, remote_net_id);
+}
+
 bool WebRtcVoiceMediaChannel::MuteStream(uint32_t ssrc, bool muted) {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   int channel = GetSendChannelId(ssrc);