Init payment configuration to fix 3ds dialog crash on android when using stripe-android 16.10.0

Proposed changes

This fixes the crash described here:

https://github.com/tipsi/tipsi-stripe/issues/785#issuecomment-863402006

Types of changes

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[ x] Bugfix (a non-breaking change which fixes an issue)
[ ] New feature (a non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist

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[ ] I have added tests that prove my fix is useful or that my feature works
[ ] I have added necessary documentation (if appropriate)
[ ] I know that my PR will be merged only if it has tests and they pass

Further comments

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tipsi / tipsi-stripe