Introduce the new API InitializeControl on Control

[KlausLoeffelmann]

This PR

• fixes Add InitializeControl(int deviceDpi) to Control for Early Initialization #13550.
• fixes Can't Remove DarkMode Form Theme inside OnHandleCreated event #13460.

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 84.11215% with 17 lines in your changes missing coverage. Please review.

Project coverage is 76.59677%. Comparing base (f2060df) to head (549e268).

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #13551         +/-   ##
===================================================
+ Coverage   75.42791%   76.59677%   +1.16886%     
===================================================
  Files           3230        3230                 
  Lines         639213      639275         +62     
  Branches       47303       47304          +1     
===================================================
+ Hits          482145      489664       +7519     
+ Misses        148044      146032       -2012     
+ Partials        9024        3579       -5445     

Flag	Coverage Δ
Debug	76.59677% <84.11215%> (+1.16886%)	⬆️
integration	18.81093% <71.02804%> (?)
production	51.01187% <84.11215%> (+2.61216%)	⬆️
test	97.40114% <ø> (ø)
unit	48.41017% <84.11215%> (+0.01046%)	⬆️

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