UnsatisfiedLinkError when manually registering functions via JNI_OnLoad

For example, we have an application with Java Service. Both the main activity and the Service linked to the same `.so` library, but the Service has an additional arguments to the `.so` library at the `AndroidManifest.xml`.

So, when the main application and the Service are closed and we run the Java Service by external trigger, for example by phone call we see the following actions:

1. The Java Service is started
2. It loads the `.so` library
3. The `JNI_OnLoad()` function is called at the `.so` library and we register Java native methods by using `JNIEnv::RegisterNatives()` method
4. The `main()` function is called at the `.so` library
5. After several seconds we call a native method from Java side
6. We get the `java.lang.UnsatisfiedLinkError: No implementation found for...` error

But when we call the `System.loadLibrary()` method from Java side we see the following actions:

1. The Java Service is started
2. It loads the `.so` library
3. The `JNI_OnLoad()` function is called at the `.so` library and we register Java native methods by using `JNIEnv::RegisterNatives()` method
4. The `main()` function is called at the `.so` library
5. We call the `System.loadLibrary()` method from Java side
6. The `JNI_OnLoad()` function is called at the `.so` library and we register Java native methods by using `JNIEnv::RegisterNatives()` method
7. The `main()` function is NOT called at the `.so` library. And it is a problem.
8. After several seconds we call a native method from Java side
9. The native method is called at C++ side, but because the `main()` function was not called the `qApp` is null and we do not have Qt main event loop here. And it is a problem.

Related bug report: https://bugreports.qt.io/browse/QTBUG-68813