This doesn't really matters for v1, as there won't be a payment confirmation dialog, but we should probably update `trustedUILayerID` in the `open-payment-confirmation-dialog` case too, since it is also opening a trusted UI at https://github.com/jedp/gaia/blob/5c353693217840b6627f462672981ebef5ba63cb/apps/system/js/payment.js#L84