Refactor payment_method_type_if_non_interactive_authentication_flow_completed_ and CreditCardImportType into PaymentsFDI

This CL refactors
payment_method_type_if_non_interactive_authentication_flow_completed_
into PaymentsFormDataImporter, as well as all relevant functions that
touch it and its definition. It also moves the enum definition for
CreditCardImportType into PaymentsFDI.

This CL is a no-op.

DD: go/formdataimporter-subdirectory-refactor-design
Bug: 481379161
Change-Id: I9cb3da67bc7e2f3fc0cd390977961137ad7afd5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7549027
Reviewed-by: Florian Leimgruber <fleimgruber@google.com>
Commit-Queue: Vinny Persky <vinnypersky@google.com>
Reviewed-by: Olivia Saul <osaul@google.com>
Cr-Commit-Position: refs/heads/main@{#1586570}