RFR: 8313556: Create implementation of NSAccessibilitySlider protocol [v8]

[Ambarish Rapte]

On Wed, 5 Mar 2025 17:12:36 GMT, Alexander Zuev <kizune at openjdk.org> wrote:

>> Create implementation for Slider and Stepper accessibility protocols.
>> Fix mapping.
>> Fix performAction parameter type in declaration.
>
> Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove duplicate code make accessibilityLabel explicitly call accessibilityTitle and add coment explaining why.

Marked as reviewed by arapte (Reviewer).

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PR Review: https://git.openjdk.org/jfx/pull/1226#pullrequestreview-2661970870