TESTS DO NOT MERGE Mgr34 feat/top app bar/dense variant

[moog16]

tests for #520

[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.

[codecov-io]

Codecov Report

Merging #523 into rc0.8.0 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           rc0.8.0     #523   +/-   ##
========================================
  Coverage    96.62%   96.62%           
========================================
  Files           59       59           
  Lines         1984     1984           
  Branches       235      235           
========================================
  Hits          1917     1917           
  Misses          67       67

Impacted Files	Coverage Δ
packages/top-app-bar/index.js	100% <ø> (ø)	⬆️

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[moog16]

merged #520