Merge pull request #24426 from dkurt:qrcode_eci_encoding

Consider QRCode ECI encoding #24426

### Pull Request Readiness Checklist

related: https://github.com/opencv/opencv/pull/24350#pullrequestreview-1661658421

1. Add `getEncoding` method to obtain ECI number
2. Add `detectAndDecodeBytes`, `decodeBytes`, `decodeBytesMulti`, `detectAndDecodeBytesMulti` methods in Python (return `bytes`) and Java (return `byte[]`)
3. Allow Python bytes to std::string conversion in general and add `encode(byte[] encoded_info, Mat qrcode)` in Java


    Python example with Kanji encoding:
    ```python
    img = cv.imread("test.png")
    detect = cv.QRCodeDetector()
    data, points, straight_qrcode = detect.detectAndDecodeBytes(img)
    print(data)
    print(detect.getEncoding(), cv.QRCodeEncoder_ECI_SHIFT_JIS)
    print(data.decode("shift-jis"))
    ```
    ```
    b'\x82\xb1\x82\xf1\x82\xc9\x82\xbf\x82\xcd\x90\xa2\x8aE'
    20 20
    こんにちは世界
    ```

    source: https://github.com/opencv/opencv/blob/ba4d6c859d21536f84e0328c16f4cc3e96bf3065/modules/objdetect/test/test_qrcode_encode.cpp#L332

    ![test](https://github.com/opencv/opencv/assets/25801568/0b5eefa8-918a-4c42-9acb-830f23c0ea9f)


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

modules/objdetect/misc/java/src/cpp/objdetect_converters.cpp

@@ -0,0 +1,20 @@
+#include "objdetect_converters.hpp"
+
+#define LOG_TAG "org.opencv.objdetect"
+
+void Copy_vector_NativeByteArray_to_List(JNIEnv* env, std::vector<std::string>& vs, jobject list)
+{
+    static jclass juArrayList       = ARRAYLIST(env);
+    jmethodID m_clear     = LIST_CLEAR(env, juArrayList);
+    jmethodID m_add       = LIST_ADD(env, juArrayList);
+
+    env->CallVoidMethod(list, m_clear);
+    for (std::vector<std::string>::iterator it = vs.begin(); it != vs.end(); ++it)
+    {
+        jsize sz = static_cast<jsize>((*it).size());
+        jbyteArray element = env->NewByteArray(sz);
+        env->SetByteArrayRegion(element, 0, sz, reinterpret_cast<const jbyte*>((*it).c_str()));
+        env->CallBooleanMethod(list, m_add, element);
+        env->DeleteLocalRef(element);
+    }
+}

modules/objdetect/misc/java/src/cpp/objdetect_converters.hpp

@@ -0,0 +1,14 @@
+// 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 OBJDETECT_CONVERTERS_HPP
+#define	OBJDETECT_CONVERTERS_HPP
+
+#include <jni.h>
+#include "opencv_java.hpp"
+#include "opencv2/core.hpp"
+
+void Copy_vector_NativeByteArray_to_List(JNIEnv* env, std::vector<std::string>& vs, jobject list);
+
+#endif	/* OBJDETECT_CONVERTERS_HPP */