RFR: 8340985: Open source some Desktop related tests [v4]

[Alexander Zuev]

On Fri, 4 Oct 2024 08:34:10 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

>> There is a @key headful on line 27.
>
> Looks like this line is deleted in recent commit..
> 
> ![Img](https://github.com/user-attachments/assets/278bb982-f72e-4b0a-b9b4-1c815ee0bca2)

That was a mistake. Restoring it.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21321#discussion_r1788094375