[BUG] Payment Sheet address collection behaving differently across platforms

[miduncan]

Summary

We're finding that given the same configuration, the "County" field is being marked as required on iOS and optional on Android. After talking with our Stripe rep, they determined that since the collection mode is PaymentSheet.AddressCollectionMode.FULL, iOS has the correct behavior of requiring the field and Android has a bug for marking it optional.

Code to reproduce

This is our config (although we are using from stripe-react-native)

const { error } = await initPaymentSheet({
      merchantDisplayName: merchantName,
      allowsRemovalOfLastSavedPaymentMethod: false,
      googlePay: showGooglePay
        ? {
            merchantCountryCode: 'US',
            currencyCode: currency,
            testEnv: isTestEnvironment,
            buttonType: PlatformPay.ButtonType.Book,
          }
        : undefined,
      intentConfiguration: {
        mode: {
          amount: roundedAmount,
          currencyCode: currency,
          setupFutureUsage: ON_SESSION,
        },
        confirmHandler,
        paymentMethodTypes,
      },
      customerId: customerId || '',
      customerEphemeralKeySecret: ephemeralKey || '',
      billingDetailsCollectionConfiguration: {
        name: PaymentSheet.CollectionMode.ALWAYS,
        address: PaymentSheet.AddressCollectionMode.FULL,
      },
      appearance: customAppearance,
      defaultBillingDetails: {
        address: {
          city: address?.city || '',
          country: address?.countryCode || '',
          line1: address?.addressLine1 || '',
          line2: address?.addressLine2 || '',
          postalCode: address?.zip || '',
          state: address?.state || '',
        },
      },
      returnURL: 'https://www.rover.com',
 });

To reproduce, we checkout with Paypal in Ireland.