Angular Material focus styles not applying in Shadow DOM

[richiyang]

🐞 bug report

Affected Package

This issue is caused by /pull/18667

Is this a regression?

Yes.

Description

Keyboard focus and click focus styles no longer apply to Angular Material components when using Shadow DOM. Possibly due to the change in focus using walk down the DOM.

🔬 Minimal Reproduction

https://stackblitz.com/edit/no-focus-style-for-interactive-element-shadowdom

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