Add AmazonPay as a new payment method to Android PaymentSheet

[lisaliu-stripe]

Summary

Added Amazon Pay as a new payment method to Android PaymentSheet according to this guide.

Motivation

https://jira.corp.stripe.com/browse/THREEP_API-956

Testing

• Added tests
• Modified tests
• Manually verified
  Ran payment sheet example to verify the new payment method is working.

Screenshots

Before	After
before screenshot	after screenshot

Changelog

[Added] Support for AmazonPay (private beta).

[tillh-stripe]

Looks good! Small note about the release notes and the ignored test.

[tillh-stripe]

Nit: We could remove the SVG part, because we only use the PNGs on Android.

[tillh-stripe]

We should figure this out before we merge this. Happy to help with that!

[tillh-stripe]

Ah, I noticed that the issue is in the Web view. Is this something that will be fixed in the near future?

[lisaliu-stripe]

I'm not sure about that, it will be updated to Amazon's own page once they start to build it out, so I marked it as ignored for now

[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 │   3.5 MiB │   3.5 MiB │    +69 B │   7.8 MiB │   7.8 MiB │    +200 B 
     arsc │   2.1 MiB │   2.1 MiB │   +768 B │   2.1 MiB │   2.1 MiB │    +768 B 
 manifest │   4.9 KiB │   4.9 KiB │      0 B │  24.1 KiB │  24.1 KiB │       0 B 
      res │ 867.5 KiB │ 876.3 KiB │ +8.8 KiB │   1.3 MiB │   1.3 MiB │ +19.1 KiB 
   native │   2.6 MiB │   2.6 MiB │      0 B │     6 MiB │     6 MiB │       0 B 
    asset │     3 MiB │     3 MiB │    +86 B │     3 MiB │     3 MiB │    +660 B 
    other │ 199.6 KiB │ 199.7 KiB │   +141 B │ 446.5 KiB │ 446.8 KiB │    +328 B 
──────────┼───────────┼───────────┼──────────┼───────────┼───────────┼───────────
    total │  12.3 MiB │  12.3 MiB │ +9.8 KiB │  20.7 MiB │  20.7 MiB │ +21.1 KiB 

 DEX     │ old   │ new   │ diff       
─────────┼───────┼───────┼────────────
   files │     1 │     1 │  0         
 strings │ 38224 │ 38226 │ +2 (+3 -1) 
   types │ 12644 │ 12644 │  0 (+0 -0) 
 classes │ 10668 │ 10668 │  0 (+0 -0) 
 methods │ 56030 │ 56030 │  0 (+0 -0) 
  fields │ 35182 │ 35183 │ +1 (+1 -0) 

 ARSC    │ old  │ new  │ diff       
─────────┼──────┼──────┼────────────
 configs │  290 │  290 │  0         
 entries │ 6922 │ 6924 │ +2 (+2 -0)

APK

     compressed      │     uncompressed      │                        
──────────┬──────────┼───────────┬───────────┤                        
 size     │ diff     │ size      │ diff      │ path                   
──────────┼──────────┼───────────┼───────────┼────────────────────────
  4.4 KiB │ +4.4 KiB │   9.3 KiB │  +9.3 KiB │ + res/Uo.xml           
  4.4 KiB │ +4.4 KiB │   9.8 KiB │  +9.8 KiB │ + res/BT.xml           
  2.1 MiB │   +768 B │   2.1 MiB │    +768 B │ ∆ resources.arsc       
  2.4 KiB │    +86 B │  19.2 KiB │    +660 B │ ∆ assets/lpms.json     
 62.7 KiB │    +70 B │ 140.9 KiB │    +164 B │ ∆ META-INF/CERT.SF     
 48.5 KiB │    +70 B │ 140.8 KiB │    +164 B │ ∆ META-INF/MANIFEST.MF 
  3.5 MiB │    +69 B │   7.8 MiB │    +200 B │ ∆ classes.dex          
    951 B │     +1 B │   2.5 KiB │       0 B │ ∆ res/9N.xml           
    598 B │     -1 B │   1.1 KiB │       0 B │ ∆ res/NO.xml           
    489 B │     -1 B │     836 B │       0 B │ ∆ res/UZ.xml           
  1.2 KiB │     +1 B │   1.2 KiB │       0 B │ ∆ META-INF/CERT.RSA    
──────────┼──────────┼───────────┼───────────┼────────────────────────
  5.8 MiB │ +9.8 KiB │  10.2 MiB │ +21.1 KiB │ (total)

DEX

STRINGS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   38224 │ 38226 │ +2 (+3 -1) 
  + AmazonPay
  + amazon_pay
  + ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:d40fd68,r8-mode:full,version:8.0.46}
  
  - ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:b8603e1,r8-mode:full,version:8.0.46}
  

FIELDS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   35182 │ 35183 │ +1 (+1 -0) 
  + me.a0 u: z

ARSC

ENTRIES:

   old  │ new  │ diff       
  ──────┼──────┼────────────
   6922 │ 6924 │ +2 (+2 -0) 
  + drawable/stripe_ic_paymentsheet_pm_amazon_pay
  + string/stripe_paymentsheet_payment_method_amazon_pay

[tillh-stripe]

Nit: Can you move this to the top spot above the first CHANGED note?