chore: convert WidgetConfigScreenAdapter to ViewBinding

[david-allison]

• Part of #11116

Approach

• Using the commit: https://github.com/david-allison/Anki-Android/pull/44/commits/ab8a64d8066d74917fc06dee13de65cfa51a47b5

How Has This Been Tested?

Brief test:

• API 36 Tablet emulator: Deck Picker Widget config opens and appears suable

Checklist

• [x] You have a descriptive commit message with a short title (first line, max 50 chars).
• [x] You have commented your code, particularly in hard-to-understand areas
• [x] You have performed a self-review of your own code
• [ ] UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• [ ] UI Changes: You have tested your change using the Google Accessibility Scanner