[24] JEP 472 Prepare to Restrict the Use of JNI

[mpalat]

ref : https://openjdk.org/jeps/472

Summary
Issue warnings about uses of the Java Native Interface (JNI) and adjust the Foreign Function & Memory (FFM) API to issue warnings in a consistent manner. All such warnings aim to prepare developers for a future release that ensures integrity by default by uniformly restricting JNI and the FFM API. Application developers can avoid both current warnings and future restrictions by selectively enabling these interfaces where essential.