RFR: 8328482: Convert and Open source few manual applet test to main based [v5]

[Tejesh R]

On Wed, 3 Apr 2024 16:37:26 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

>> Yeah, had missed this point. Updated now, thanks for pointing it out.
>
> This update looks good. But we still need one .gif that has opaque background. Currently both the .gif have transparent background.
> 
> ![image](https://github.com/openjdk/jdk/assets/95945681/4f01269e-e76d-4ab6-a24f-cec3be3c4ad7)

Yeah, updated with opaque image, `duke_404.gif`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18448#discussion_r1550986566