Experimental ipp observer facade 2

[samiuelson]

Closes: #

Description

Steps to reproduce

Testing information

The tests that have been performed

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• 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.

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• 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.
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[dangermattic]

	7 Errors
🚫	Please add tests for class CardReaderPaymentController (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class IppPaymentStateObserver (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class PaymentFlowState (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class IppPaymentUIConfig (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class IppPaymentUI (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class Custom (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class WooPosCardReaderState (or add unit-tests-exemption label to ignore this).

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

Generated by 🚫 Danger

[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	1fa690b
	Direct Download	woocommerce-wear-prototype-build-pr12830-1fa690b.apk

[wpmobilebot]

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

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	1fa690b
	Direct Download	woocommerce-prototype-build-pr12830-1fa690b.apk