Switch voice transport to use Call and Stream instead of VoENetwork.

webrtc/audio/audio_send_stream_unittest.cc

Index: webrtc/audio/audio_send_stream_unittest.cc
diff --git a/webrtc/audio/audio_send_stream_unittest.cc b/webrtc/audio/audio_send_stream_unittest.cc
index c04a3de77c203e00aedeb67b34c0115f7fcdf68b..24efaada1038ac5903d12e5071e5a08f289a5960 100644
--- a/webrtc/audio/audio_send_stream_unittest.cc
+++ b/webrtc/audio/audio_send_stream_unittest.cc
@@ -89,6 +89,10 @@ struct ConfigHelper {
               .Times(1);
           EXPECT_CALL(*channel_proxy_, ResetCongestionControlObjects())
               .Times(1);
+          EXPECT_CALL(*channel_proxy_, RegisterExternalTransport(nullptr))
+              .Times(1);
+          EXPECT_CALL(*channel_proxy_, DeRegisterExternalTransport())
+              .Times(1);
           return channel_proxy_;
         }));
     stream_config_.voe_channel_id = kChannelId;