Video capture Android: enable unittests for Camera2 API

media/capture/video/android/video_capture_device_android.h

Index: media/capture/video/android/video_capture_device_android.h
diff --git a/media/capture/video/android/video_capture_device_android.h b/media/capture/video/android/video_capture_device_android.h
index a0796eec803a5d4e99c73865f5f37e6c36203e03..fe61ee6a4d24f77c315a5e5971c0e6506a2f852a 100644
--- a/media/capture/video/android/video_capture_device_android.h
+++ b/media/capture/video/android/video_capture_device_android.h
@@ -100,6 +100,8 @@ class CAPTURE_EXPORT VideoCaptureDeviceAndroid : public VideoCaptureDevice {
                     jlong callback_id,
                     const base::android::JavaParamRef<jbyteArray>& data);
 
+  void ConfigureForTesting();
+
  private:
   enum InternalState {
     kIdle,        // The device is opened but not in use.