Don't reconfigure the encoder if the video options aren't changing.

webrtc/media/engine/fakewebrtccall.h

Index: webrtc/media/engine/fakewebrtccall.h
diff --git a/webrtc/media/engine/fakewebrtccall.h b/webrtc/media/engine/fakewebrtccall.h
index fa58ebbe58f8ddfa514f5de7c46fbf6ac72bf7ca..744ffa78ad86bffbf34da633b231985dc65b14eb 100644
--- a/webrtc/media/engine/fakewebrtccall.h
+++ b/webrtc/media/engine/fakewebrtccall.h
@@ -117,6 +117,9 @@ class FakeVideoSendStream final : public webrtc::VideoSendStream,
   int GetLastHeight() const;
   int64_t GetLastTimestamp() const;
   void SetStats(const webrtc::VideoSendStream::Stats& stats);
+  int num_encoder_reconfigurations() const {
+    return num_encoder_reconfigurations_;
+  }
 
  private:
   void IncomingCapturedFrame(const webrtc::VideoFrame& frame) override;
@@ -146,6 +149,7 @@ class FakeVideoSendStream final : public webrtc::VideoSendStream,
   int num_swapped_frames_;
   webrtc::VideoFrame last_frame_;
   webrtc::VideoSendStream::Stats stats_;
+  int num_encoder_reconfigurations_ = 0;
 };
 
 class FakeVideoReceiveStream final : public webrtc::VideoReceiveStream {