feat(radio/checkbox): Improve printing stylesheet

[felhag]

Feature Description

Not sure if this is a bug or a feature, but when printing some components the background-color isn't included. For example:

• radio buttons
• checkboxes
• sliders (found a separate issue for this: [FR] Make sliders printable #11364)

There might be more components of course.

Use Case

Use the browser print function on page containing Angular Components. Because the background-color isn't included you can't tell if a radio or checkbox is selected.

Component:

When printing:

[crisbeto]

Closing since the related PR was just merged in.

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}