Fix build for Versa 2 on SDK 4.3.0

[floe]

I have an old-ish Versa 2 and your app was one of my primary usecases, until Google bought Fitbit and decided they couldn't be bothered to support 3rd-party apps in Europe anymore 🙄 But it was fairly easy to get it to work again, just needed some minor patches and I have my TOTP codes back 😁