fix(top-app-bar): Fix wrong className for TopAppBarAdjust

[33577]

Hi,
I want to resolve this issue, #634.
Since media query, className mdc-top-app-bar--fixed-adjust has higher priority than .mdc-top-app-bar--dense-fixed-adjust in <TopAppBarFixedAdjust dense />.

So, I want to add className mdc-top-app-bar--fixed-adjust when all props (dense, denseProminent, prominent, short) are undefined or false.
Since the only css property that mdc-top-app-bar--fixed-adjust or .mdc-top-app-bar--dense-fixed-adjust manipulates is padding-top, I think this PR makes sense.
But, I know this PR makes the className mdc-top-app-bar--fixed-adjust loose its role as default className for <TopAppBarFixedAdjust />
In addition, I'm worried since this line need update if another property of TopAppBarFixedAdjust is created newly.

If you have more appropriate idea, please let me know.

Thanks!!

(In <TopAppBarFixedAdjust dense />, I want 48px padding-top but 56px is activated)

resolve: #634

[codecov]

Codecov Report

Merging #635 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #635   +/-   ##
=======================================
  Coverage   83.05%   83.06%           
=======================================
  Files          99       99           
  Lines        3223     3224    +1     
  Branches      741      744    +3     
=======================================
+ Hits         2677     2678    +1     
  Misses        541      541           
  Partials        5        5           

Impacted Files	Coverage Δ
src/top-app-bar/index.tsx	100.00% <100.00%> (ø)

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