Allow uk_ keys for customer ephemeral keys

[guido-stripe]

Related to: stripe/stripe-react-native#2169

Summary

This is an internal change that's needed by the Stripe Dashboard mobile app.

Fixes a regression that stopped allowing using uk_ keys as customer ephemeral keys in the Payment Sheet. This key is needed by the Stripe Dashboard mobile app.

Things were working properly in previous versions of the app, so I assume this is a regression.

Motivation

Needed by the Stripe Dashboard app for MOTO.

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 │   2.1 MiB │   2.1 MiB │  0 B │   4.3 MiB │   4.3 MiB │  0 B 
     arsc │   1.1 MiB │   1.1 MiB │  0 B │   1.1 MiB │   1.1 MiB │  0 B 
 manifest │   2.3 KiB │   2.3 KiB │  0 B │     8 KiB │     8 KiB │  0 B 
      res │ 302.7 KiB │ 302.7 KiB │  0 B │ 456.5 KiB │ 456.5 KiB │  0 B 
   native │   7.9 MiB │   7.9 MiB │  0 B │  19.3 MiB │  19.3 MiB │  0 B 
    asset │   7.7 KiB │   7.7 KiB │  0 B │   7.4 KiB │   7.4 KiB │  0 B 
    other │  95.7 KiB │  95.7 KiB │ -7 B │ 183.5 KiB │ 183.5 KiB │  0 B 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
    total │  11.5 MiB │  11.5 MiB │ -7 B │  25.4 MiB │  25.4 MiB │  0 B 

 DEX     │ old   │ new   │ diff      
─────────┼───────┼───────┼───────────
   files │     1 │     1 │ 0         
 strings │ 20706 │ 20706 │ 0 (+0 -0) 
   types │  6514 │  6514 │ 0 (+0 -0) 
 classes │  5278 │  5278 │ 0 (+0 -0) 
 methods │ 31549 │ 31549 │ 0 (+0 -0) 
  fields │ 18271 │ 18271 │ 0 (+0 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  163 │  163 │  0   
 entries │ 3665 │ 3665 │  0

APK

   compressed    │   uncompressed   │                                           
──────────┬──────┼───────────┬──────┤                                           
 size     │ diff │ size      │ diff │ path                                      
──────────┼──────┼───────────┼──────┼───────────────────────────────────────────
 29.2 KiB │ -3 B │  64.6 KiB │  0 B │ ∆ META-INF/CERT.SF                        
  1.2 KiB │ -2 B │   1.2 KiB │  0 B │ ∆ META-INF/CERT.RSA                       
    271 B │ -1 B │     120 B │  0 B │ ∆ META-INF/version-control-info.textproto 
 25.9 KiB │ -1 B │  64.5 KiB │  0 B │ ∆ META-INF/MANIFEST.MF                    
──────────┼──────┼───────────┼──────┼───────────────────────────────────────────
 56.5 KiB │ -7 B │ 130.5 KiB │  0 B │ (total)