Improve payment/refund flow cancellation tracking

[samiuelson]

Context:

1. [POS] Custom Payment UI — Part 3 | Emitting UI–agnostic payment states in CardReaderPaymentController #12877 (comment)
2. [POS] Custom Payment UI — Part 3 | Emitting UI–agnostic payment states in CardReaderPaymentController #12877 (comment)

• Improve IPP analytics tracking — add tracking for all the possible states by using the payment state class name in CardReaderTrackCanceledFlow class.
• Throw exception if nameForTracking is null in debug mode

[dangermattic]

Thanks for reporting! 👍