[HACK][Woo POS] PR 5/5: Remove POS-related code from payments and clean up

[kidinov]

WOOMOB-1854

Description

Clean up the codebase after moving card reader connection to WooPos-specific implementation:

• Remove WooPosCardReaderActivity (replaced by new connection dialog)
• Update WooPosCardReaderFacade to use new connection flow
• Remove POS-specific branches from payments cardreader package
• Update related tests

Test Steps

1. Code review only - verifies cleanup doesn't break existing functionality
2. Smoke test IPP connection/payment flows

• 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.

[dangermattic]

	1 Error
🚫	This PR is tagged with status: do not merge label(s).

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

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	912a394
	Direct Download	woocommerce-wear-prototype-build-pr15073-912a394.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	912a394
	Direct Download	woocommerce-prototype-build-pr15073-912a394.apk

[codecov-commenter]

Codecov Report

❌ Patch coverage is 41.66667% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 38.18%. Comparing base (1105aa1) to head (912a394).

Files with missing lines	Patch %	Lines
.../statuschecker/CardReaderStatusCheckerViewModel.kt	33.33%	2 Missing ⚠️
...ts/methodselection/SelectPaymentMethodViewModel.kt	0.00%	2 Missing ⚠️
...reader/onboarding/CardReaderOnboardingViewModel.kt	0.00%	1 Missing ⚠️
...ce/android/ui/payments/hub/PaymentsHubViewModel.kt	0.00%	1 Missing ⚠️
...oid/ui/woopos/cardreader/WooPosCardReaderFacade.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                       @@
##             woomob-1854-pr4-integration   #15073   +/-   ##
==============================================================
  Coverage                          38.18%   38.18%           
+ Complexity                         10364    10362    -2     
==============================================================
  Files                               2173     2173           
  Lines                             124600   124569   -31     
  Branches                           17251    17246    -5     
==============================================================
- Hits                               47575    47569    -6     
+ Misses                             72219    72196   -23     
+ Partials                            4806     4804    -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[malinajirka]

LGTM - thorough testing will be done later.

We'll need to verify tracking events are consistent with iOS