Merge pull request #27228 from utibenkei:fix_java_enum_wrapper

Explicitly specify enum type scopes to improve Java wrapper generation #27228 

Changed DataLayout and ImagePaddingMode to dnn::DataLayout and dnn::ImagePaddingMode to explicitly specify their scopes. This allows gen_java.py to correctly register  disc_type, preventing constructors and methods using these enum types from being skipped during Java wrapper generation.

Similarly updated QRCodeEncoder::CorrectionLevel and QRCodeEncoder::EncodeMode with explicit scope declarations.

Also added a new Java test class `DnnBlobFromImageWithParamsTest` based on: https://github.com/opencv/opencv/blob/4.x/modules/dnn/test/test_misc.cpp#L133-L243

Related issues
#23753 

### Pull Request Readiness Checklist

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- [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
- [ ] 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/objdetect/include/opencv2/objdetect.hpp

@@ -741,10 +741,10 @@ public:
         CV_PROP_RW int version;
 
         //! The optional level of error correction (by default - the lowest).
-        CV_PROP_RW CorrectionLevel correction_level;
+        CV_PROP_RW QRCodeEncoder::CorrectionLevel correction_level;
 
         //! The optional encoding mode - Numeric, Alphanumeric, Byte, Kanji, ECI or Structured Append.
-        CV_PROP_RW EncodeMode mode;
+        CV_PROP_RW QRCodeEncoder::EncodeMode mode;
 
         //! The optional number of QR codes to generate in Structured Append mode.
         CV_PROP_RW int structure_number;