Show blocked brands in CBC dropdown, but block selection

[porter-stripe]

Summary

• Instead of just hiding disallowed card brands in the CBC dropdown, we should instead show them as disabled and prevent them from being selected. When the user attempts to scroll to a disallowed brand it is "rolled back" to the previous selection.

Update card flow

Simulator.Screen.Recording.-.iOS.18.-.2025-01-22.at.09.45.28.mp4

New card flow

Simulator.Screen.Recording.-.iOS.18.-.2025-01-23.at.09.25.00.mp4

Motivation

https://jira.corp.stripe.com/browse/MOBILESDK-3035

Testing

• New unit test
• Manual

Changelog

N/A (private beta for now)

[github-actions]

⚠️ Missing Translations
The following strings have been uploaded to Lokalise but are not yet translated.

(not accepted)

If it's okay for these strings to be unlocalized in master (e.g. this is for an unshipped feature), add the label ship without translations to acknowledge that there are missing translations. Otherwise, wait until translations are available in Lokalise and re-run this job.

New strings are localized on a weekly basis and are downloaded as part of the release process. For more details on how to localize a string, you can refer to this link.

[porter-stripe]

Added the "ship without translations" b/c:

1. This feature is in private beta
2. None of the merchants using this feature use CBC

By the time we GA this feature translations will have come in, we won't GA until they do.