Workaround ColoPicker AoT issue

[AndrewKeepCoding]

Work around AoT issue by setting ColorPicker value in code instead of using XAML binding.

Fixes

Fixes #509.

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the current behavior?

The ColorPicker control throws an exception.

What is the new behavior?

The ColorPicker works as expected without throwing exceptions.

PR Checklist

Please check if your PR fulfills the following requirements:

• Created a feature/dev branch in your fork (vs. submitting directly from a commit on main)
• Based off latest main branch of toolkit
• Tested code with current supported SDKs
• New component
  • Documentation has been added
  • Sample in sample app has been added
  • Analyzers are passing for documentation and samples
  • Icon has been created (if new sample) following the Thumbnail Style Guide and templates
• Tests for the changes have been added (if applicable)
• Header has been added to all new source files
• Contains NO breaking changes

Other information

[Arlodotexe]

Ran into this while testing the new ColorAnalyzer component in WCT Labs. Tested and pulled locally, it fixes the issue we have on the main branch!