Components: fix ToggleGroupControlBackdrop not updating size when isAdaptiveWidth prop changes

[ciampo]

Description

This PR fixes an issue occurring in ToggleGroupControl — the backdrop element, in charge of highlighting the selected element, doesn't currently update its size/position when the isAdaptiveWidth prop changes.

To fix this issue, this PR simply forwards the isAdaptiveProp from the parent ToggleGroupControl component to the ToggleGroupControlBackdrop, and it uses it as an additional dependency for the useEffect hook that recalculates the backdrop position/size.

Fixes #34587

How has this been tested?

Screenshots

Before:

togglegroup-befire.mp4

After:

togglegroup-after.mp4

Types of changes

Bug fix

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• N/A I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[ntsekouras]

Thanks Marco! This works well!

Failures will be fixed after this one: #34596