fix(material/slider): update inactive input width on value change

[wagnermaciel]

• fixes https://github.com/angular/components/issues/28206

[wagnermaciel]

Stackblitz demo

I've created a demo which makes the hidden input elements visible and outlined so that we can see how changing the value is not currently updating their widths.

https://stackblitz.com/edit/45m3gu?file=src%2Fexample%2Fslider-range-example.html,src%2Fexample%2Fslider-range-example.ts,src%2Fexample%2Fslider-range-example.css,src%2Fstyles.scss

Steps to reproduce

• Click "Change Values"
• Note that the inputs have not changed widths to mirror the value changes

Screenshots

Before

After

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