Show inline error for Link signups

[tillh-stripe]

Summary

This pull request improves error handling in the Link signup screen when used with Instant Bank Payments.

Motivation

Testing

• Added tests
• Modified tests
• Manually verified

Screenshots

Before	After
before screenshot	after screenshot

Changelog

[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 │ +541 B │   4.1 MiB │   4.1 MiB │ +184 B 
     arsc │     1 MiB │     1 MiB │    0 B │     1 MiB │     1 MiB │    0 B 
 manifest │   2.3 KiB │   2.3 KiB │    0 B │     8 KiB │     8 KiB │    0 B 
      res │ 301.8 KiB │ 301.8 KiB │    0 B │ 455.5 KiB │ 455.5 KiB │    0 B 
   native │   6.2 MiB │   6.2 MiB │    0 B │  15.8 MiB │  15.8 MiB │    0 B 
    asset │   7.1 KiB │   7.1 KiB │   -1 B │   6.9 KiB │   6.9 KiB │   -1 B 
    other │  90.2 KiB │  90.2 KiB │   -3 B │ 170.3 KiB │ 170.3 KiB │    0 B 
──────────┼───────────┼───────────┼────────┼───────────┼───────────┼────────
    total │   9.6 MiB │   9.6 MiB │ +537 B │  21.5 MiB │  21.5 MiB │ +183 B 

 DEX     │ old   │ new   │ diff       
─────────┼───────┼───────┼────────────
   files │     1 │     1 │  0         
 strings │ 19966 │ 19966 │  0 (+3 -3) 
   types │  6188 │  6188 │  0 (+0 -0) 
 classes │  4979 │  4979 │  0 (+0 -0) 
 methods │ 29759 │ 29759 │  0 (+2 -2) 
  fields │ 17526 │ 17528 │ +2 (+3 -1) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  164 │  164 │  0   
 entries │ 3622 │ 3622 │  0

APK

    compressed     │   uncompressed    │                               
──────────┬────────┼──────────┬────────┤                               
 size     │ diff   │ size     │ diff   │ path                          
──────────┼────────┼──────────┼────────┼───────────────────────────────
    2 MiB │ +541 B │  4.1 MiB │ +184 B │ ∆ classes.dex                 
 28.4 KiB │   -4 B │ 62.9 KiB │    0 B │ ∆ META-INF/CERT.SF            
  6.3 KiB │   -1 B │  6.2 KiB │   -1 B │ ∆ assets/dexopt/baseline.prof 
  1.2 KiB │   +1 B │  1.2 KiB │    0 B │ ∆ META-INF/CERT.RSA           
──────────┼────────┼──────────┼────────┼───────────────────────────────
    2 MiB │ +537 B │  4.2 MiB │ +183 B │ (total)

DEX

STRINGS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   19966 │ 19966 │ 0 (+3 -3) 
  
  + VZLLLZLZZLILII
  + VZLLLZLZZLILLII
  + ~~R8{"backend":"dex","compilation-mode":"release","has-checksums":false,"min-api":21,"pg-map-id":"9df4753","r8-mode":"full","version":"8.7.14"}
  
  - VZLLLZLZZLII
  - VZLLLZLZZLILI
  - ~~R8{"backend":"dex","compilation-mode":"release","has-checksums":false,"min-api":21,"pg-map-id":"1a8fa34","r8-mode":"full","version":"8.7.14"}
  

METHODS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   29759 │ 29759 │ 0 (+2 -2) 
  
  + P0.c j(boolean, U, n, e, boolean, Integer, boolean, boolean, n, int, String, p, int, int)
  + S3.W <init>(boolean, U, n, e, boolean, Integer, boolean, boolean, n, int, String, int, int)
  
  - P0.c j(boolean, U, n, e, boolean, Integer, boolean, boolean, n, int, p, int)
  - S3.W <init>(boolean, U, n, e, boolean, Integer, boolean, boolean, n, int, int)
  

FIELDS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   17526 │ 17528 │ +2 (+3 -1) 
  
  + S3.W Y: String
  + S3.W Z: int
  + S3.W a0: int
  
  - S3.W Y: int