8386991: Insets are incorrectly set in newer Gnome versions

[satyenme]

The original backport of JDK-8305825 missed changes to src/java.desktop/unix/classes/sun/awt/X11/XDecoratedPeer.java for JDK 17 and below. This leads to the SimpleTest.java test included on that JBS issue continuing to fail on Ubuntu 24.04.

This patch adds in the relevant code from the original JDK-8305825 patch to ensure the test passes and windows are rendered with the correct insets and size.

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Progress

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Issue

• JDK-8386991: Insets are incorrectly set in newer Gnome versions (Bug - P3)

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