Prevent back during payment intent confirmation

[tillh-stripe]

Summary

This pull request fixes an issue where a payment was incorrectly displayed as failed when pressing the back button while confirming the payment intent.

We now ignore back presses in the PaymentLauncherConfirmationActivity.

Motivation

Resolves #5771

Testing

• Added tests
• Modified tests
• Manually verified

Screenshots

N/A

Changelog

[CHANGED] We now disable the back button while confirming intents via PaymentLauncher to prevent them from incorrectly being displayed as failed.

[tillh-stripe]

Thoughts on the wording?

[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 │  5.2 MiB │  5.2 MiB │ +247 B │  13.6 MiB │  13.6 MiB │ +444 B 
     arsc │  1.9 MiB │  1.9 MiB │    0 B │   1.9 MiB │   1.9 MiB │    0 B 
 manifest │  4.1 KiB │  4.1 KiB │    0 B │  19.2 KiB │  19.2 KiB │    0 B 
      res │    1 MiB │    1 MiB │    0 B │   1.8 MiB │   1.8 MiB │    0 B 
   native │  2.5 MiB │  2.5 MiB │    0 B │   5.9 MiB │   5.9 MiB │    0 B 
    asset │    3 MiB │    3 MiB │   -4 B │     3 MiB │     3 MiB │   -4 B 
    other │ 82.4 KiB │ 82.4 KiB │    0 B │ 158.4 KiB │ 158.4 KiB │    0 B 
──────────┼──────────┼──────────┼────────┼───────────┼───────────┼────────
    total │ 13.7 MiB │ 13.7 MiB │ +243 B │  26.4 MiB │  26.4 MiB │ +440 B 

         │          raw           │            unique            
         ├────────┬────────┬──────┼────────┬────────┬────────────
 DEX     │ old    │ new    │ diff │ old    │ new    │ diff       
─────────┼────────┼────────┼──────┼────────┼────────┼────────────
   files │      2 │      2 │    0 │        │        │            
 strings │  84861 │  84863 │   +2 │  70467 │  70468 │ +1 (+3 -2) 
   types │  21946 │  21947 │   +1 │  19666 │  19667 │ +1 (+2 -1) 
 classes │  17638 │  17639 │   +1 │  17638 │  17639 │ +1 (+2 -1) 
 methods │  94656 │  94660 │   +4 │  90532 │  90536 │ +4 (+7 -3) 
  fields │ 102423 │ 102424 │   +1 │ 101123 │ 101124 │ +1 (+1 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  334 │  334 │  0   
 entries │ 6252 │ 6252 │  0

APK

    compressed    │   uncompressed   │                                
─────────┬────────┼─────────┬────────┤                                
 size    │ diff   │ size    │ diff   │ path                           
─────────┼────────┼─────────┼────────┼────────────────────────────────
 2.1 MiB │ +247 B │ 5.8 MiB │ +444 B │ ∆ classes2.dex                 
   773 B │   -3 B │   641 B │   -3 B │ ∆ assets/dexopt/baseline.profm 
   8 KiB │   -1 B │ 7.9 KiB │   -1 B │ ∆ assets/dexopt/baseline.prof  
─────────┼────────┼─────────┼────────┼────────────────────────────────
 2.1 MiB │ +243 B │ 5.9 MiB │ +440 B │ (total)

DEX

STRINGS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   70467 │ 70468 │ +1 (+3 -2) 
  + ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:8cdf001,r8-mode:compatibility,version:3.3.83}
  + Lcom/stripe/android/payments/paymentlauncher/PaymentLauncherConfirmationActivity_onCreate_1;
  + Lcom/stripe/android/payments/paymentlauncher/PaymentLauncherConfirmationActivity_onCreate_3;
  
  - ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:d0fe804,r8-mode:compatibility,version:3.3.83}
  - Lcom/stripe/android/payments/paymentlauncher/PaymentLauncherConfirmationActivity_onCreate_2;
  

TYPES:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   19666 │ 19667 │ +1 (+2 -1) 
  + Lcom/stripe/android/payments/paymentlauncher/PaymentLauncherConfirmationActivity_onCreate_1;
  + Lcom/stripe/android/payments/paymentlauncher/PaymentLauncherConfirmationActivity_onCreate_3;
  
  - Lcom/stripe/android/payments/paymentlauncher/PaymentLauncherConfirmationActivity_onCreate_2;
  

METHODS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   90532 │ 90536 │ +4 (+7 -3) 
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_1 <clinit>()
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_1 <init>()
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_1 invoke(Object) → Object
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_1 invoke(j)
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_3 <init>(Object)
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_3 invoke(Object) → Object
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_3 invoke(PaymentResult)
  
  - com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_2 <init>(Object)
  - com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_2 invoke(Object) → Object
  - com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_2 invoke(PaymentResult)
  

FIELDS:

   old    │ new    │ diff       
  ────────┼────────┼────────────
   101123 │ 101124 │ +1 (+1 -0) 
  + com.stripe.android.payments.paymentlauncher.PaymentLauncherConfirmationActivity_onCreate_1 INSTANCE: PaymentLauncherConfirmationActivity_onCreate_1