fix(menu): Fix bug where TAB does not respect the default browser tab order.

[joyzhong]

No description provided.

[abhiomkar]

(Reviewed this with previous branch's diff)

Looks good overall. Left minor comments.

[mdc-web-bot]

All 690 screenshot tests passed for commit 7d031b1 vs. develop! 💯🎉

[mdc-web-bot]

All 690 screenshot tests passed for commit a20d03e vs. develop! 💯🎉

[codecov-io]

Codecov Report

Merging #4789 into develop will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #4789      +/-   ##
===========================================
+ Coverage    98.95%   98.95%   +<.01%     
===========================================
  Files          129      129              
  Lines         6309     6312       +3     
  Branches       812      813       +1     
===========================================
+ Hits          6243     6246       +3     
  Misses          65       65              
  Partials         1        1

Impacted Files	Coverage Δ
packages/mdc-menu-surface/foundation.ts	100% <100%> (ø)	⬆️
packages/mdc-menu-surface/component.ts	100% <100%> (ø)	⬆️
packages/mdc-menu/foundation.ts	96.25% <100%> (ø)	⬆️
packages/mdc-menu/component.ts	100% <100%> (ø)	⬆️

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[mdc-web-bot]

All 690 screenshot tests passed for commit c539af6 vs. develop! 💯🎉