Instantly pass network changes to controllers in audio network adaptor.

webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h b/webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h
index 5402fa11d65f9a7d15206f76a49e0ff4c500d9df..0bcb4fd172b5d2b0d156279847a52d59581b8d6f 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/channel_controller.h
@@ -35,12 +35,16 @@ class ChannelController final : public Controller {
 
   explicit ChannelController(const Config& config);
 
-  void MakeDecision(const NetworkMetrics& metrics,
-                    AudioNetworkAdaptor::EncoderRuntimeConfig* config) override;
+  ~ChannelController() override;
+
+  void UpdateNetworkMetrics(const NetworkMetrics& network_metrics) override;
+
+  void MakeDecision(AudioNetworkAdaptor::EncoderRuntimeConfig* config) override;
 
  private:
   const Config config_;
   size_t channels_to_encode_;
+  rtc::Optional<int> uplink_bandwidth_bps_;
   RTC_DISALLOW_COPY_AND_ASSIGN(ChannelController);
 };