bug(slide-toggle): no remaining focus if clicked on non active toggle

### 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

if a non focused toggle is clicked, there is no remaining focus - bad if keyboard control is used afterwards.
However if the label is clicked instead, the remaining focus works.

### Reproduction

Steps to reproduce:
1. https://material.angular.io/components/slide-toggle/overview
2. click on not focused toggle vs click on not focused label

### Expected Behavior

remaining focus should appear on click on a non focused toggle

### Actual Behavior

no remaining focus on click on a not already focused toggle

### Environment

- Angular: 15.1.1
- CDK/Material: 15.1.1
- Browser(s): all
- Operating System (e.g. Windows, macOS, Ubuntu): all

Reproduce the behavior at the slide-toggle overview URL by comparing a click on an unfocused toggle with a click on its label. Trace the slide-toggle focus handling and verify that clicking a non-focused toggle leaves visible keyboard focus, while preserving the existing label behavior.

Written by the indexing model from the issue text.