Added FlowDirection picker to SampleController

[Avid29]

Fixes #4515

Adds a flow direction option to the Sample Controller in the sample app

PR Type

Sample app changes

What is the current behavior?

None

What is the new behavior?

Flow Direction can be selected in the sample app

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)
  (It does not appear I have permission to do this. I will need the branch created for me)
• Based off latest main branch of toolkit
• Tested code with current supported SDKs
• Contains NO breaking changes

Other information

This feature has already helped me find a few bugs with the Carousel Control and Shadow Animations

[ghost]

Thanks Avid29 for opening a Pull Request! The reviewers will test the PR and highlight if there is any conflict or changes required. If the PR is approved we will proceed to merge the pull request 🙌