md-menu: Blocked aria-hidden on an element because its descendant retained focus.

Nobody has claimed this yet.

### What is affected?

Accessibility, Component

### Description

When defocusing a menu in a specific way, the following error appears in the console:

> Blocked aria-hidden on an element because its descendant retained focus. The focus must not be hidden from assistive technology users. Avoid using aria-hidden on a focused element or its ancestor. Consider using the inert attribute instead, which will also prevent focus. For more details, see the aria-hidden section of the WAI-ARIA specification at https://w3c.github.io/aria/#aria-hidden.
> Element with focus: li
> Ancestor with aria-hidden: ​…​​

This error will only appear when the following conditions are met:

1. The menu must be fully open (the menu will not auto-close otherwise)
2. The new focus must be something outside of the current browser page (another tab, window, app, etc.)
3. The error will only appear once per menu

### Reproduction

https://material-web.dev/components/menu/

### Workaround

I have not found a workaround

### Is this a regression?

No or unsure. This never worked, or I haven't tried before.

### Affected versions

2.2.0

### Browser/OS/Node environment

Browser: Chrome 131.0.6778.205
OS: Windows 11

Start with the linked md-menu reproduction and reproduce the Chrome console warning by fully opening the menu, moving focus outside the page, and allowing it to close. Trace the menu's focus and aria-hidden behavior, then verify that the warning no longer appears under those conditions without breaking normal menu closing or accessibility behavior.

Written by the indexing model from the issue text.