Delete useNewUpdateCardScreen feature flag

[amk-stripe]

Summary

Delete useNewUpdateCardScreen feature flag

Motivation

The flag is no longer being used.

https://jira.corp.stripe.com/browse/MOBILESDK-2874

Testing

• Added tests
• Modified tests
• Manually verified

[github-actions]

Diffuse output:

OLD: paymentsheet-example-release-master.apk (signature: V1, V2)
NEW: paymentsheet-example-release-pr.apk (signature: V1, V2)

          │           compressed           │        uncompressed         
          ├───────────┬───────────┬────────┼──────────┬──────────┬───────
 APK      │ old       │ new       │ diff   │ old      │ new      │ diff  
──────────┼───────────┼───────────┼────────┼──────────┼──────────┼───────
      dex │   3.9 MiB │   3.9 MiB │ -132 B │  8.6 MiB │  8.6 MiB │ -84 B 
     arsc │   2.2 MiB │   2.2 MiB │    0 B │  2.2 MiB │  2.2 MiB │   0 B 
 manifest │     5 KiB │     5 KiB │    0 B │ 24.9 KiB │ 24.9 KiB │   0 B 
      res │ 908.4 KiB │ 908.4 KiB │    0 B │  1.4 MiB │  1.4 MiB │   0 B 
   native │   2.6 MiB │   2.6 MiB │    0 B │    6 MiB │    6 MiB │   0 B 
    asset │   1.6 MiB │   1.6 MiB │   -1 B │  1.6 MiB │  1.6 MiB │  -1 B 
    other │   1.4 MiB │   1.4 MiB │   -5 B │  1.6 MiB │  1.6 MiB │   0 B 
──────────┼───────────┼───────────┼────────┼──────────┼──────────┼───────
    total │  12.6 MiB │  12.6 MiB │ -138 B │ 21.5 MiB │ 21.5 MiB │ -85 B 

 DEX     │ old   │ new   │ diff       
─────────┼───────┼───────┼────────────
   files │     1 │     1 │  0         
 strings │ 40596 │ 40595 │ -1 (+1 -2) 
   types │ 14010 │ 14010 │  0 (+0 -0) 
 classes │ 11684 │ 11684 │  0 (+0 -0) 
 methods │ 59631 │ 59631 │  0 (+0 -0) 
  fields │ 39811 │ 39810 │ -1 (+0 -1) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  243 │  243 │  0   
 entries │ 6208 │ 6208 │  0

APK

    compressed     │   uncompressed    │                               
──────────┬────────┼───────────┬───────┤                               
 size     │ diff   │ size      │ diff  │ path                          
──────────┼────────┼───────────┼───────┼───────────────────────────────
  3.9 MiB │ -132 B │   8.6 MiB │ -84 B │ ∆ classes.dex                 
  1.2 KiB │   -3 B │   1.2 KiB │   0 B │ ∆ META-INF/CERT.RSA           
 50.2 KiB │   -2 B │ 118.4 KiB │   0 B │ ∆ META-INF/MANIFEST.MF        
  7.8 KiB │   -1 B │   7.7 KiB │  -1 B │ ∆ assets/dexopt/baseline.prof 
──────────┼────────┼───────────┼───────┼───────────────────────────────
    4 MiB │ -138 B │   8.7 MiB │ -85 B │ (total)

DEX

STRINGS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   40596 │ 40595 │ -1 (+1 -2) 
  
  + ~~R8{"backend":"dex","compilation-mode":"release","has-checksums":false,"min-api":21,"pg-map-id":"6430e07","r8-mode":"full","version":"8.7.14"}
  
  - Enable new update card screen
  - ~~R8{"backend":"dex","compilation-mode":"release","has-checksums":false,"min-api":21,"pg-map-id":"f4a91d4","r8-mode":"full","version":"8.7.14"}
  

FIELDS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   39811 │ 39810 │ -1 (+0 -1) 
  
  - i5.d c: t