bug(cdk/menu): sub menu with disabled items only is not closed when other sub menu is opened

### Is this a regression?

- [ ] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

_No response_

### Description

This issue only occurs when using the menu with a keyboard.

If in a cdk menu, a sub menu is opened with ONLY disabled children, and then another sub menu is opened, that sub menu with the disabled children remains open.

### Reproduction

StackBlitz link: https://stackblitz.com/edit/components-issue-stnsdh?file=src%2Fapp%2Fexample-component.html
Steps to reproduce:
1. focus "Open Menu" button
2. press space / open menu
3. navigate to menu item "With disabled child" using arrow keys
4. open sub menu by pressing arrow right
5. navigate to "With enabled child" by pressing arrow up
6. open sub menu by pressing arrow right

### Expected Behavior

Sub menu with disabled child is closed

### Actual Behavior

Sub menu with disabled child is NOT closed

### Environment

- Angular: 15
- CDK/Material: 15
- Browser(s): Firefox
- Operating System (e.g. Windows, macOS, Ubuntu): Ubuntu

Inizia dalla riproduzione StackBlitz collegata e traccia il comportamento della navigazione da tastiera del menu Angular CDK per i sottomenu che contengono solo elementi figli disabilitati. Verifica la sequenza in Firefox su Ubuntu, quindi conferma che l'apertura del secondo sottomenu chiuda il primo mantenendo il comportamento previsto della tastiera.

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