Delay intent creation and open 'add' if no saved payment methods

[wooj-stripe]

Summary

• 1: If a customer has no saved payment methods, we automatically open the add payment method view
• 2: Intent creation was happening when tapping "add" -- we now delay this to when a user taps the "add" button.

Motivation

• Design feedback for the first item -- and to do this, we needed to do 2.

Testing

manual testing

Before	After