For #18287 - Display a credit card autofill prompt

[gabrielluong]

Fixes #18287

Pull Request checklist

• Tests: This PR includes thorough tests or an explanation of why it does not
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features. In addition, it includes a screenshot of a successful accessibility scan to ensure no new defects are added to the product.

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[jonalmeida]

This is not the right way to adding a storage delegate. Unfortunately, we have logins that started doing this with the pattern following.

Maybe we need to file an issue to fix this up to change these APIs before it happens the third or fourth time.

[gabrielluong]

This isn't adding the storage delegate. We're adding the storage delegate here

fenix/app/src/main/java/org/mozilla/fenix/gecko/GeckoProvider.kt

Line 93 in 8adc69f

geckoRuntime.autocompleteStorageDelegate = GeckoAutocompleteStorageDelegate(

. This is simply about passing the underlying storage so that it can be passed to their respective storage delegate when the GeckoRuntime is created and can be set via autocompleteStorageDelegate, which is its proper GV API.

[jonalmeida]

We're talking about the same thing at a different abstraction level. See the Engine.kt API which is how we should be adding these storage delegates.

I think it's a bit too late in this particular process to clean this up, so let's do it in a follow up.

[mergify]

This pull request has conflicts when rebasing. Could you fix it @gabrielluong? 🙏