Method hook_jni_native_methods

Hook JNI native methods for a Java class. This looks up all registered JNI native methods and replaces them with your own functions. The original function pointer will be saved in each `JNINativeMethod`'s `fnPtr` (thus the `&mut` requirement in the function signature). If no matching class, method name, or signature is found, that specific `JNINativeMethod.fnPtr` will be set to [std::ptr::null_m

(
        &self,
        env: JNIEnv,
        class_name: &JNIStr,
        methods: &mut [JNINativeMethod],
    )