[WooPos][Non Simple Product types] Retry UI for pagination errors on variations screens

[AnirudhBhat]

Closes: #12967

Description

This PR adds a new UI for retrying errors during paginating variations.

Along with this, this PR also does a small change in totals screen after payment is success. It navigates the screen back to items list screen so that when we click on "new order" button from the payment success screen, we end up on the items list screen instead of variations screen if we had proceeded to totals screen from variations screen.

Design

Implementation

Testing information

Retry pagination UI

1. Navigate to POS mode (more menu -> POS)
2. Click on any variable products that has more than 10 variations
3. Ensure you navigate to the variations screen
4. Turn on airplane mode
5. Scroll down
6. Ensure you see the pagination error UI
7. Click on retry and ensure nothing happens as we are still in airplane mode
8. Turn off airplane mode
9. Now, click on retry button again
10. Ensure the variations gets loaded

Navigate to items list after payment success

1. Navigate to POS mode (more menu -> POS)
2. Add products to cart
3. Navigate to variations screen before checking out
4. Ensure payment is success
5. Click on "New Order" button
6. Ensure you navigate to items list screen.

The tests that have been performed

Tested on both light and dark modes

Images/gif

https://github.com/user-attachments/assets/20818862-21db-4ee2-b69f-5d25d5923162

• [x] 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	8ceaa5fcafbeb30e7c78215273c790430a005d47
	Direct Download	woocommerce-wear-prototype-build-pr12972-8ceaa5f.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	8ceaa5fcafbeb30e7c78215273c790430a005d47
	Direct Download	woocommerce-prototype-build-pr12972-8ceaa5f.apk

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 39.63%. Comparing base (3be8fe3) to head (8ceaa5f).

Files with missing lines	Patch %	Lines
...ce/android/ui/woopos/home/items/WooPosItemsList.kt	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## issue/12846-analytics-for-variations #12972 +/- ## ========================================================================== - Coverage 39.63% 39.63% -0.01% Complexity 5973 5973 ========================================================================== Files 1268 1268 Lines 73276 73279 +3 Branches 10057 10058 +1 ========================================================================== + Hits 29041 29042 +1 - Misses 41656 41659 +3 + Partials 2579 2578 -1 ```

:umbrella: View full report in Codecov by Sentry.
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[kidinov]

@AnirudhBhat 👋

Where does this design come from? IMO, it doesn't match expectations from this kind of UX in a mobile app.

I believe this should have:

• The same height as a normal item
• Just one line: icon | text | button
• When the button is clicked, we replace that with the "loading indicator" list item till the response comes

Something like that maybe?

@malinajirka @samiuelson wdyt?