fix: WCO crash on bad titlebarStyle

[codebytere]

Description of Change

Closes #34137.

Fixes an issue where calling setTitlebarOverlay with an initially invalid titleBarStyle on Windows would result in a crash. Ideally, we'd throw in the constructor, but that causes a whole host of issues, so we instead no-op if we attempt to call setTitleBarStyle and the overlay was never correctly initialized.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixes an issue where calling setTitlebarOverlay with an initially invalid titleBarStyle on Windows would result in a crash.

[codebytere]

@jkleinsc it looks like the WOA failure is real - would you be able to potentially help verify on your local machine?

[MarshallOfSound]

Looks like both (x64 + WOA) windows failures are legit @codebytere

[codebytere]

I see two options:

1. Try to fix the newly added functionality test as part of this PR (thereby expanding scope since this PR only fixes the crash and that test correctly passes)
2. Remove the non-crash test and open a new PR to add it and fix the failure, since it's not actually testing the issue at hand.

Thoughts? @jkleinsc @MarshallOfSound

[jkleinsc]

@codebytere I'd pick option 2.

[codebytere]

@jkleinsc done!

[release-clerk]

Release Notes Persisted

Fixes an issue where calling setTitlebarOverlay with an initially invalid titleBarStyle on Windows would result in a crash.

[trop]

I was unable to backport this PR to "19-x-y" cleanly;
you will need to perform this backport manually.

[trop]

@codebytere has manually backported this PR to "19-x-y", please check out #34302

[miniak]

/trop run backport-to 18-x-y

[trop]

The backport process for this PR has been manually initiated - sending your PR to 18-x-y!

[trop]

I was unable to backport this PR to "18-x-y" cleanly;
you will need to perform this backport manually.