Merge pull request #3967 from gursimarsingh:fastcv_cvtcolor_addition

Added fastcv color conversions #3967

This pull request introduces FastCV-based color conversions:

```
    COLOR_YUV2YUV444sp_NV12      //!< FastCV: YCbCr420PseudoPlanar to YCbCr444PseudoPlanar
    COLOR_YUV2YUV422sp_NV12      //!< FastCV: YCbCr420PseudoPlanar to YCbCr422PseudoPlanar
    COLOR_YUV422sp2YUV444sp      //!< FastCV: YCbCr422PseudoPlanar to YCbCr444PseudoPlanar
    COLOR_YUV422sp2YUV_NV12      //!< FastCV: YCbCr422PseudoPlanar to YCbCr420PseudoPlanar
    COLOR_YUV444sp2YUV422sp      //!< FastCV: YCbCr444PseudoPlanar to YCbCr422PseudoPlanar
    COLOR_YUV444sp2YUV_NV12      //!< FastCV: YCbCr444PseudoPlanar to YCbCr420PseudoPlanar
    COLOR_YUV2RGB565_NV12        //!< FastCV: YCbCr420PseudoPlanar to RGB565
    COLOR_YUV422sp2RGB565        //!< FastCV: YCbCr422PseudoPlanar to RGB565
    COLOR_YUV422sp2RGB           //!< FastCV: YCbCr422PseudoPlanar to RGB888
    COLOR_YUV422sp2RGBA          //!< FastCV: YCbCr422PseudoPlanar to RGBA8888
    COLOR_YUV444sp2RGB565        //!< FastCV: YCbCr444PseudoPlanar to RGB565
    COLOR_YUV444sp2RGB           //!< FastCV: YCbCr444PseudoPlanar to RGB888
    COLOR_YUV444sp2RGBA          //!< FastCV: YCbCr444PseudoPlanar to RGBA8888
    COLOR_RGB2YUV_NV12           //!< FastCV: RGB888 to YCbCr420PseudoPlanar
    COLOR_RGB5652YUV444sp        //!< FastCV: RGB565 to YCbCr444PseudoPlanar
    COLOR_RGB5652YUV422sp        //!< FastCV: RGB565 to YCbCr422PseudoPlanar
    COLOR_RGB5652YUV_NV12        //!< FastCV: RGB565 to YCbCr420PseudoPlanar
    COLOR_RGB2YUV444sp           //!< FastCV: RGB888 to YCbCr444PseudoPlanar
    COLOR_RGB2YUV422sp           //!< FastCV: RGB888 to YCbCr422PseudoPlanar
```

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

Author: gursimarsingh

modules/fastcv/include/opencv2/fastcv.hpp

@@ -37,6 +37,7 @@
 #include "opencv2/fastcv/fft_dsp.hpp"
 #include "opencv2/fastcv/edges_dsp.hpp"
 #include "opencv2/fastcv/blur_dsp.hpp"
+#include "opencv2/fastcv/color.hpp"
 
 /**
  * @defgroup fastcv Module-wrapper for FastCV hardware accelerated functions

modules/fastcv/include/opencv2/fastcv/color.hpp

@@ -0,0 +1,43 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+
+#ifndef OPENCV_FASTCV_COLOR_HPP
+#define OPENCV_FASTCV_COLOR_HPP
+
+#include <opencv2/core.hpp>
+
+namespace cv
+{
+namespace fastcv
+{
+
+enum ColorConversionCodes {
+    // FastCV-specific color conversion codes (avoid collision with OpenCV core)
+    COLOR_YUV2YUV444sp_NV12 = 156, //!< FastCV: YCbCr420PseudoPlanar to YCbCr444PseudoPlanar
+    COLOR_YUV2YUV422sp_NV12 = 157, //!< FastCV: YCbCr420PseudoPlanar to YCbCr422PseudoPlanar
+    COLOR_YUV422sp2YUV444sp = 158, //!< FastCV: YCbCr422PseudoPlanar to YCbCr444PseudoPlanar
+    COLOR_YUV422sp2YUV_NV12 = 159, //!< FastCV: YCbCr422PseudoPlanar to YCbCr420PseudoPlanar
+    COLOR_YUV444sp2YUV422sp = 160, //!< FastCV: YCbCr444PseudoPlanar to YCbCr422PseudoPlanar
+    COLOR_YUV444sp2YUV_NV12 = 161, //!< FastCV: YCbCr444PseudoPlanar to YCbCr420PseudoPlanar
+    COLOR_YUV2RGB565_NV12 = 162, //!< FastCV: YCbCr420PseudoPlanar to RGB565
+    COLOR_YUV422sp2RGB565 = 163, //!< FastCV: YCbCr422PseudoPlanar to RGB565
+    COLOR_YUV422sp2RGB = 164, //!< FastCV: YCbCr422PseudoPlanar to RGB888
+    COLOR_YUV422sp2RGBA = 165, //!< FastCV: YCbCr422PseudoPlanar to RGBA8888
+    COLOR_YUV444sp2RGB565 = 166, //!< FastCV: YCbCr444PseudoPlanar to RGB565
+    COLOR_YUV444sp2RGB = 167, //!< FastCV: YCbCr444PseudoPlanar to RGB888
+    COLOR_YUV444sp2RGBA = 168, //!< FastCV: YCbCr444PseudoPlanar to RGBA8888
+    COLOR_RGB2YUV_NV12 = 169, //!< FastCV: RGB888 to YCbCr420PseudoPlanar
+    COLOR_RGB5652YUV444sp = 170, //!< FastCV: RGB565 to YCbCr444PseudoPlanar
+    COLOR_RGB5652YUV422sp = 171, //!< FastCV: RGB565 to YCbCr422PseudoPlanar
+    COLOR_RGB5652YUV_NV12 = 172, //!< FastCV: RGB565 to YCbCr420PseudoPlanar
+    COLOR_RGB2YUV444sp = 173, //!< FastCV: RGB888 to YCbCr444PseudoPlanar
+    COLOR_RGB2YUV422sp = 174, //!< FastCV: RGB888 to YCbCr422PseudoPlanar
+};
+
+CV_EXPORTS_W void cvtColor(InputArray src, OutputArray dst, int code);
+
+}}; //cv::fastcv namespace end
+
+#endif // OPENCV_FASTCV_COLOR_HPP