bug(material/chips): Chips should have larger touch targets

### 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

Even though icon button defaults to 40px, the touch target is still 48px from here: https://gith
ub.com/angular/components/blob/main/src/material/button/_button-base.scss#L126.

Chips has interactive icons buttons or the chip itself is interactive, it should also have a touch target of at least 48x48px to be more accessible

### Reproduction

https://material.angular.io/components/chips/examples

### Expected Behavior

Touch targets of at least 48x48px

### Actual Behavior

Smaller touch targets than 48x48px

### Environment

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

Start with the chips examples at material.angular.io/components/chips/examples and compare their interactive chip and icon-button dimensions with the 48px target. Read the referenced src/material/button/_button-base.scss styles, then locate the corresponding chips implementation and tests; done means interactive chips and their icons provide touch targets of at least 48x48px.

Written by the indexing model from the issue text.