[Issue-1146] Fix CardField validation problem on Android

[pavelglebov]

Issue: #1146

Order of react props apply is not as expected:
setCountryCode applied first, then setPostalCodeEnabled. As postalCodeEnabled is true by default, it leads to issues with postalCodeEnabled={false} on react side.

Summary

Safely change mCardWidget.postalCodeRequired = false when postalCodeEnabled={false}

Motivation

For some reason, react props are applied to Android native element in unexpected order (countryCode first, then postalCodeEnabled), which in conjunction with default value of polstalCodeEnabled === true leads to non-working CardField on Android with postalCodeEnabled={false}

Testing

• I tested this manually
• I added automated tests

Documentation

Select one:

• I have added relevant documentation for my changes.
• This PR does not result in any developer-facing changes.

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All committers have signed the CLA.

[charliecruzan-stripe]

nice catch! thanks for the PR 👍