* Moved all payment utils functions in a utils folder
* Delete as it's not being used
* bot: update checkstyle.xml
* bot: update checkstyle.xml
* Fix TS error
* bot: update checkstyle.xml
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
* Refresh the default payment method only if the active one is unavailable
* Add new type for serializable data store payment method
* Update uses of PaymentMethods/ExpressPaymentMethods to the plain version
* Add tests for setAvailablePaymentMethods action
* Update data store key in tests