[POS] Simultaneous cash and card payment handling

[samiuelson]

Closes: #13278 13278

Description

This PR adds improvements to the cash payment collection flow:

1. When "Mark payment as complete" is tapped in the Cash payment screen, the card reader payment intent is canceled.
2. If the card payment is initiated, the Cash payment screen should be interrupted/closed automatically, showing the card payment processing state.

Steps to reproduce

1. Open POS (menu more > Point of Sale)
2. Create order and make sure reader is connected
3. Click "Cash payment"

Testing information

The tests that have been performed

Images/gif

1. Payment intent gets canceled when order marked as paid with cash

Screen_recording_20250109_173942.mp4

3. Cash payment is closed when card is tapped to the reader

Screen_recording_20250109_173912.mp4

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on big (tablet) and small (phone) in case of UI changes, and no regressions are added.

[dangermattic]

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[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	4a506d8
	Direct Download	woocommerce-wear-prototype-build-pr13277-4a506d8.apk