Add system tray icon support on Linux

ADDITIONAL SYSTEM INFORMATION :
openjdk 17.0.2 2022-01-18, Ubuntu 20.04.3 LTS


A DESCRIPTION OF THE PROBLEM :
This is test code

public class TestCode {

    public static void main(String[] args) {
        System.out.println("Tray supported:" + java.awt.SystemTray.isSupported());
    }
}

This code gives the following output on my Ubuntu 20.04.3 LTS

Tray supported:false

At the same system tray is supported, because in the right top corner of the screen I see : <attached>

This problem was also discussed on SO - https://stackoverflow.com/questions/72594274/awt-and-ubuntu-20-the-system-tray-is-not-supported-on-the-current-platform


FREQUENCY : always