Move NV21 colorspace treatment from VideoCapture java to C++

media/video/capture/android/video_capture_device_android.h

Index: media/video/capture/android/video_capture_device_android.h
diff --git a/media/video/capture/android/video_capture_device_android.h b/media/video/capture/android/video_capture_device_android.h
index 29a5fc7cf5dea14713ca5cd3c8dc7bba3f4dc43b..6c02f02ef8b690a11b0b52e40713d047b2799bdb 100644
--- a/media/video/capture/android/video_capture_device_android.h
+++ b/media/video/capture/android/video_capture_device_android.h
@@ -53,8 +53,16 @@ class MEDIA_EXPORT VideoCaptureDeviceAndroid : public VideoCaptureDevice {
     kError  // Hit error. User needs to recover by destroying the object.
   };
 
+  // Automatically generated enum to interface with Java world.
+  enum AndroidImageFormat {
+#define DEFINE_ANDROID_IMAGEFORMAT(name, value) name = value,
+#include "media/video/capture/android/imageformat_list.h"
+#undef DEFINE_ANDROID_IMAGEFORMAT
+  };
+
   explicit VideoCaptureDeviceAndroid(const Name& device_name);
   bool Init();
+  VideoPixelFormat GetColorspace();
   void SetErrorState(const std::string& reason);
 
   // Prevent racing on accessing |state_| and |observer_| since both could be