chore: import upstream snapshot with attribution

samples/android/tutorial-4-opencl/jni/jni.cpp

@@ -0,0 +1,36 @@
+#include <jni.h>
+#include "CLprocessor.hpp"
+
+extern "C" {
+JNIEXPORT jboolean JNICALL Java_org_opencv_samples_tutorial4_NativePart_builtWithOpenCL(JNIEnv * env, jclass cls);
+
+JNIEXPORT jint JNICALL Java_org_opencv_samples_tutorial4_NativePart_initCL(JNIEnv * env, jclass cls);
+
+JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial4_NativePart_closeCL(JNIEnv * env, jclass cls);
+
+JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial4_NativePart_processFrame(JNIEnv * env, jclass cls, jint tex1, jint tex2, jint w, jint h, jint mode);
+
+JNIEXPORT jboolean JNICALL Java_org_opencv_samples_tutorial4_NativePart_builtWithOpenCL(JNIEnv * env, jclass cls)
+{
+#ifdef OPENCL_FOUND
+    return JNI_TRUE;
+#else
+    return JNI_FALSE;
+#endif
+}
+
+JNIEXPORT jint JNICALL Java_org_opencv_samples_tutorial4_NativePart_initCL(JNIEnv * env, jclass cls)
+{
+    return initCL();
+}
+
+JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial4_NativePart_closeCL(JNIEnv * env, jclass cls)
+{
+    closeCL();
+}
+
+JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial4_NativePart_processFrame(JNIEnv * env, jclass cls, jint tex1, jint tex2, jint w, jint h, jint mode)
+{
+    processFrame(tex1, tex2, w, h, mode);
+}
+} // extern "C"