Merge pull request #20367 from augustinmanecy:features2d-rw

**Merge with contrib**: https://github.com/opencv/opencv_contrib/pull/3003

### 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 other license that is incompatible with OpenCV
- [x] The PR is proposed to proper branch
- [ ] There is reference to 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.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/features2d/misc/objc/gen_dict.json

@@ -1,4 +1,10 @@
 {
+    "ManualFuncs" : {
+        "SimpleBlobDetector": {
+            "setParams": { "declaration" : [""], "implementation" : [""] },
+            "getParams": { "declaration" : [""], "implementation" : [""] }
+        }
+    },
     "enum_fix" : {
         "FastFeatureDetector" : { "DetectorType": "FastDetectorType" },
         "AgastFeatureDetector" : { "DetectorType": "AgastDetectorType" }