RFR: 8298266: "java.home property not set" error in Graal when sun.awt.fontconfig java property is set on Windows

[Alexander Scherbatiy]

**Environment**: 
GraalVM 22.3.0 with  jdk 19, Windows OS.

**Description**:
Create a native image of Swing application using GraalVM and run it with ` -Dsun.awt.fontconfig=fontconfig.properties.src` java property.
`java.lang.Error: java.home property not set` error is thrown.

For more details see https://github.com/oracle/graal/issues/4875.

**Solution**:
The error is thrown by the code from [FontConfiguration.findFontConfigFile()](https://github.com/openjdk/jdk19u/blob/c9d485792b99233f381dcdfd69838e7b973909bd/src/java.desktop/share/classes/sun/awt/FontConfiguration.java#L175) method.
GraalVM does not set `java.home`  property, that is why the `java.lang.Error: java.home property not set` is thrown.
`FontConfiguration.findFontConfigFile()` method compares `java.home` property to null before checking user provided `sun.awt.fontconfig` java property.

The proposed fix swaps the order of `java.home` and `sun.awt.fontconfig` properties checking to avoid using `java.home` property in case `sun.awt.fontconfig` is set.


**Steps to reproduce**:
- Download graal 22.3.0 jdk 19 for Windows from [GraalVM Community Edition 22.3.0](https://github.com/graalvm/graalvm-ce-builds/releases/tag/vm-22.3.0) page.
- Install native-image

graalvm-ce-java19-22.3.0\bin\gu.cmd install native-image

- Create and compile `SwingSample.java` sample

import java.awt.*;
import javax.swing.*;

public class SwingSample {
    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeAndWait(() -> {

            JFrame frame = new JFrame("Hello World");

            JButton button = new JButton("Hello");
            button.addActionListener(e -> {
                System.out.printf("Hello, World!%n");
            });

            JPanel panel = new JPanel(new FlowLayout());
            panel.add(button);

            frame.add(panel);
            frame.setSize(400, 300);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
        });
    }
}

- Run native-image-agent to generate configuration files

graalvm-ce-java19-22.3.0\bin\java.cmd -agentlib:native-image-agent=config-output-dir=conf-dir SwingSample

- Copy `graalvm-ce-java19-22.3.0\lib\fontconfig.properties.src` file to the sample dir
- Generate native image with configuration files and `-Djava.awt.headless=false `, `-Dsun.awt.fontconfig=fontconfig.properties.src` java properties

call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64"
graalvm-ce-java19-22.3.0\bin\native-image.cmd --no-fallback -Djava.awt.headless=false -Dsun.awt.fontconfig=fontconfig.properties.src -H:ResourceConfigurationFiles=conf-dir/resource-config.json -H:SerializationConfigurationFiles=conf-dir/serialization-config.json -H:ReflectionConfigurationFiles=conf-dir/reflect-config.json -H:JNIConfigurationFiles=conf-dir/jni-config.json SwingSample

- Run the native image with `-Dsun.awt.fontconfig=fontconfig.properties.src` java property.

swingsample.exe  -Dsun.awt.fontconfig=fontconfig.properties.src

Exception in thread "main" java.lang.reflect.InvocationTargetException
        at java.desktop at 19.0.1/java.awt.EventQueue.invokeAndWait(EventQueue.java:1371)
        at java.desktop at 19.0.1/java.awt.EventQueue.invokeAndWait(EventQueue.java:1346)
        at java.desktop at 19.0.1/javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1480)
        at SwingSample.main(SwingSample.java:7)
Caused by: java.lang.Error: java.home property not set
        at java.desktop at 19.0.1/sun.awt.FontConfiguration.findFontConfigFile(FontConfiguration.java:180)
        at java.desktop at 19.0.1/sun.awt.FontConfiguration.<init>(FontConfiguration.java:97)
        at java.desktop at 19.0.1/sun.awt.windows.WFontConfiguration.<init>(WFontConfiguration.java:41)

-------------

Commit messages:
 - 'java.home property not set' error in Graal when sun.awt.fontconfig java property is set on Windows

Changes: https://git.openjdk.org/jdk/pull/11559/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11559&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298266
  Stats: 16 lines in 1 file changed: 8 ins; 8 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11559.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11559/head:pull/11559

PR: https://git.openjdk.org/jdk/pull/11559