bug(mat-menu): VoiceOver user on mobile is able to navigate out of an opened Menu

### Description

On iOS, with VoiceOver turned on, after a user opens a menu and they start swiping through the menu items in order to move focus from one item to the next, when they reach the first or last menu item and swipe respectively backward or forward, VoiceOver focus is moved outside of the menu into the next element

### Reproduction

StackBlitz link: https://material.angular.dev/components/menu/overview#menu-overview
Steps to reproduce:
1. On an iOS device, turn VoiceOver on
2. Navigate to the menu example
3. Open the menu
4. Swipe forward until VoiceOver focus leaves the menu

### Expected Behavior

Focus is trapped in the menu

### Actual Behavior

VoiceOver focus moves outside of the menu

### Environment

- Angular: v21
- CDK/Material: v21
- Browser(s): Any
- Operating System (e.g. Windows, macOS, Ubuntu): iOS with VoiceOver turned on

Inizia riproducendo il problema nella panoramica collegata del menu Material su un dispositivo iOS con VoiceOver abilitato, quindi traccia la gestione del focus di mat-menu sul primo e sull’ultimo elemento del menu. Il lavoro è completato quando gli scorrimenti in avanti e all’indietro mantengono il focus di VoiceOver all’interno del menu aperto invece di spostarlo sull’elemento successivo.

Scritto dal modello di indicizzazione a partire dal testo della issue.