Add code coverage for ControlCommandSet.cs file

[Olina-Zhang]

Related #10773

Proposed changes

• Add unit test file: ControlCommandSetTests.cs for public methods and 2 protected methods of the ControlCommandSet.cs.

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 92.66055% with 8 lines in your changes missing coverage. Please review.

Project coverage is 61.42520%. Comparing base (df745d6) to head (7b13805).
Report is 90 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #13130         +/-   ##
===================================================
+ Coverage   61.32538%   61.42520%   +0.09981%     
===================================================
  Files           1543        1548          +5     
  Lines         158339      158588        +249     
  Branches       14745       14758         +13     
===================================================
+ Hits           97102       97413        +311     
+ Misses         60539       60472         -67     
- Partials         698         703          +5     

Flag	Coverage Δ
Debug	61.42520% <92.66055%> (-13.88816%)	⬇️
integration	10.73289% <ø> (-8.17760%)	⬇️
production	39.30591% <ø> (-36.00745%)	⬇️
test	95.67418% <92.66055%> (∅)
unit	36.74564% <ø> (-37.65504%)	⬇️

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[Tanya-Solyanik]

I added only a minor comment, otherwise looks good. @LeafShi1 - please merge if you approve this PR.