Fix crash on GooglePayLauncher when confirmation fails

[brnunes-stripe]

Summary

GooglePayLauncherViewModel would crash if StripeIntent confirmation resulted in an exception.

Motivation

Fix crash on GooglePayLauncher when StripeIntent confirmation fails (#4104)

Testing

• Added tests
• Modified tests
• Manually verified

[github-actions]

Diffuse output:

OLD: paymentsheet-example-release-master.apk (signature: none)
NEW: paymentsheet-example-release-pr.apk (signature: none)

          │           compressed           │          uncompressed          
          ├───────────┬───────────┬────────┼───────────┬───────────┬────────
 APK      │ old       │ new       │ diff   │ old       │ new       │ diff   
──────────┼───────────┼───────────┼────────┼───────────┼───────────┼────────
      dex │  11.5 MiB │  11.5 MiB │ -257 B │  39.1 MiB │  39.1 MiB │ +144 B 
     arsc │   1.3 MiB │   1.3 MiB │    0 B │   1.3 MiB │   1.3 MiB │    0 B 
 manifest │   2.5 KiB │   2.5 KiB │    0 B │  10.5 KiB │  10.5 KiB │    0 B 
      res │ 701.5 KiB │ 701.5 KiB │    0 B │     1 MiB │     1 MiB │    0 B 
    asset │  77.6 KiB │  77.6 KiB │   -2 B │ 109.1 KiB │ 109.1 KiB │   -2 B 
    other │    78 KiB │    78 KiB │   +6 B │   154 KiB │   154 KiB │    0 B 
──────────┼───────────┼───────────┼────────┼───────────┼───────────┼────────
    total │  13.7 MiB │  13.7 MiB │ -253 B │  41.8 MiB │  41.8 MiB │ +142 B 


         │          raw           │           unique            
         ├────────┬────────┬──────┼────────┬────────┬───────────
 DEX     │ old    │ new    │ diff │ old    │ new    │ diff      
─────────┼────────┼────────┼──────┼────────┼────────┼───────────
   files │      3 │      3 │    0 │        │        │           
 strings │ 177955 │ 177955 │    0 │ 165250 │ 165250 │ 0 (+2 -2) 
   types │  31288 │  31288 │    0 │  29739 │  29739 │ 0 (+0 -0) 
 classes │  27456 │  27456 │    0 │  27456 │  27456 │ 0 (+0 -0) 
 methods │ 158133 │ 158133 │    0 │ 154012 │ 154012 │ 0 (+0 -0) 
  fields │ 108087 │ 108087 │    0 │ 107785 │ 107785 │ 0 (+0 -0) 


 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  293 │  293 │  0   
 entries │ 4332 │ 4332 │  0

APK

    compressed    │   uncompressed    │                                                       
─────────┬────────┼──────────┬────────┤                                                       
 size    │ diff   │ size     │ diff   │ path                                                  
─────────┼────────┼──────────┼────────┼───────────────────────────────────────────────────────
 3.5 MiB │ -257 B │ 10.2 MiB │ +144 B │ ∆ classes2.dex                                        
   190 B │   +6 B │      6 B │    0 B │ ∆ META-INF/androidx.activity_activity-compose.version 
 5.4 KiB │   -2 B │  5.3 KiB │   -2 B │ ∆ assets/dexopt/baseline.prof                         
─────────┼────────┼──────────┼────────┼───────────────────────────────────────────────────────
 3.5 MiB │ -253 B │ 10.2 MiB │ +142 B │ (total)

DEX

STRINGS:

   old    │ new    │ diff      
  ────────┼────────┼───────────
   165250 │ 165250 │ 0 (+2 -2) 
  
  + SMAP
  GooglePayLauncherViewModel.kt
  Kotlin
  *S Kotlin
  *F
  + 1 GooglePayLauncherViewModel.kt
  com/stripe/android/googlepaylauncher/GooglePayLauncherViewModel
  + 2 Transformations.kt
  androidx/lifecycle/TransformationsKt
  + 3 fake.kt
  kotlin/jvm/internal/FakeKt
  *L
  1#1,281:1
  87#2:282
  1#3:283
  *S KotlinDebug
  *F
  + 1 GooglePayLauncherViewModel.kt
  com/stripe/android/googlepaylauncher/GooglePayLauncherViewModel
  *L
  50#1:282
  *E
  
  + Unexpected confirmation result.
  
  - SMAP
  GooglePayLauncherViewModel.kt
  Kotlin
  *S Kotlin
  *F
  + 1 GooglePayLauncherViewModel.kt
  com/stripe/android/googlepaylauncher/GooglePayLauncherViewModel
  + 2 Transformations.kt
  androidx/lifecycle/TransformationsKt
  *L
  1#1,284:1
  87#2:285
  *S KotlinDebug
  *F
  + 1 GooglePayLauncherViewModel.kt
  com/stripe/android/googlepaylauncher/GooglePayLauncherViewModel
  *L
  50#1:285
  *E
  
  - Unexpected result.