bug(mat-icon): mat-icon names are searchable and highlited doing a ctrl + f browser search

[ignaciostellino]

Reproduction

Use StackBlitz to reproduce your issue:

• Components: https://stackblitz.com/fork/components-issue
• Harnesses: https://stackblitz.com/fork/harness-issue

Steps to reproduce:

1. Do a browser search (ctlr+f) inside a page with mat-icon and search by the name of the icon and it will be highlited

Expected Behavior

What behavior were you expecting to see?

Actual Behavior

What behavior did you actually see?
Is there a way to avoid this?

Environment

• Angular: 9
• CDK/Material: mat-icon
• Browser(s): all
• Operating System (e.g. Windows, macOS, Ubuntu):

[crisbeto]

Duplicate of #23195.

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