Add initial CustomerSheet end-to-end tests.

[samer-stripe]

Summary

Add initial CustomerSheet end-to-end tests for cards.

Motivation

Ensures card LPM behavior is working end-to-end on Android

Testing

• Added tests
• Modified tests
• Manually verified

[github-actions]

Diffuse output:

OLD: identity-example-release-base.apk (signature: V1, V2)
NEW: identity-example-release-pr.apk (signature: V1, V2)

          │          compressed          │         uncompressed         
          ├───────────┬───────────┬──────┼───────────┬───────────┬──────
 APK      │ old       │ new       │ diff │ old       │ new       │ diff 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
      dex │     2 MiB │     2 MiB │  0 B │   4.3 MiB │   4.3 MiB │  0 B 
     arsc │     1 MiB │     1 MiB │  0 B │     1 MiB │     1 MiB │  0 B 
 manifest │   2.3 KiB │   2.3 KiB │  0 B │   8.1 KiB │   8.1 KiB │  0 B 
      res │ 301.5 KiB │ 301.5 KiB │  0 B │   455 KiB │   455 KiB │  0 B 
   native │   7.3 MiB │   7.3 MiB │  0 B │  18.4 MiB │  18.4 MiB │  0 B 
    asset │   1.5 MiB │   1.5 MiB │  0 B │   1.5 MiB │   1.5 MiB │  0 B 
    other │    87 KiB │    87 KiB │ +2 B │ 161.5 KiB │ 161.5 KiB │  0 B 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
    total │  12.2 MiB │  12.2 MiB │ +2 B │  25.8 MiB │  25.8 MiB │  0 B 

 DEX     │ old   │ new   │ diff      
─────────┼───────┼───────┼───────────
   files │     1 │     1 │ 0         
 strings │ 21688 │ 21688 │ 0 (+0 -0) 
   types │  6869 │  6869 │ 0 (+0 -0) 
 classes │  5634 │  5634 │ 0 (+0 -0) 
 methods │ 31448 │ 31448 │ 0 (+0 -0) 
  fields │ 18315 │ 18315 │ 0 (+0 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  164 │  164 │  0   
 entries │ 3404 │ 3404 │  0

APK

   compressed    │  uncompressed   │                                           
──────────┬──────┼──────────┬──────┤                                           
 size     │ diff │ size     │ diff │ path                                      
──────────┼──────┼──────────┼──────┼───────────────────────────────────────────
  1.2 KiB │ +2 B │  1.2 KiB │  0 B │ ∆ META-INF/CERT.RSA                       
    272 B │ +1 B │    120 B │  0 B │ ∆ META-INF/version-control-info.textproto 
 29.1 KiB │ -1 B │   64 KiB │  0 B │ ∆ META-INF/CERT.SF                        
──────────┼──────┼──────────┼──────┼───────────────────────────────────────────
 30.5 KiB │ +2 B │ 65.3 KiB │  0 B │ (total)

[samer-stripe]

Storing the adapter as part of the PlaygroundState caused the ViewModel to leak since we store the PlaygroundState in PlaygroundTestDriver. Moved it into its own flow.

[jaynewstrom-stripe]

That's weird. Was the view model holding onto it, or what?

[samer-stripe]

The methods passed into the CustomerAdapter reference ViewModel attributes (for example, settings in order to the update them).

This was a one way to solve. We could instead change the implementation to prefetch ephemeralKey & setupIntentClientSecret when preparing CustomerSheet.

[jaynewstrom-stripe]

Should we make the individual tests aware of this instead of doing it automatically?

I think we did this approach in payment sheet, but it was mostly to preserve the existing tests passing if I remember right.

[samer-stripe]

Probably yeah. With these initial cases, we shouldn't end up in this screen since we have a new customer. Otherwise, it is a bug. I'll remove the check for now and add it back for SavedPaymentMethod testing.

[jaynewstrom-stripe]

That's weird. Was the view model holding onto it, or what?