Set set_as_default_payment_method field using checkbox value

[joyceqin-stripe]

Summary

Motivation

Testing

Changelog

[github-actions]

🚨 New dead code detected in this PR:

IntentConfirmParams.swift:48 warning: Property 'setAsDefaultPM' is assigned, but never used

Please remove the dead code before merging.

If this is intentional, you can bypass this check by adding the label skip dead code check to this PR.

ℹ️ If this comment appears to be left in error, double check that the flagged code is actually used and/or make sure your branch is up-to-date with master.

[github-actions]

⚠️ Public API changes detected:

StripePayments

- public var setAsDefaultPM: Foundation.NSNumber?
- public var setAsDefaultPM: Foundation.NSNumber?

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• Do these APIs need to be public or can they be protected with @_spi(STP)?
• If these APIs need to be public, assess whether they require an API review.

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• Does this require a breaking version change?
• Do these changes require API review?

If you confirm these APIs need to be added/updated and have undergone necessary review, add the label modifies public API to this PR to acknowledge and bypass this check.

ℹ️ If this comment appears to be left in error, make sure your branch is up-to-date with master.