feat: improve speed by defaulting font-display

[StephenFluin]

This adheres us to lighthouse recommendations around best practices for font loading.

https://scotch.io/bar-talk/google-fonts-now-supports-font-display
https://font-display.glitch.me/

[jelbourn]

LGTM

[jelbourn]

Commit message should use the perf tag and mention "schematic" in the name

[devversion]

Actually tests are failing because the tests asserted that the links were inserted properly.

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of all the commit author(s), set the cla label to yes (if enabled on your project), and then merge this pull request when appropriate.

ℹ️ Googlers: Go here for more info.

[jelbourn]

Done in #16363

[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.}