Add missing app info to some Stripe API requests

[lng-stripe]

Summary

Add missing app info to the headers of some Stripe API requests.

Motivation

RUN_MOBILESDK-728

Testing

• Added tests
• Modified tests
• Manually verified

Steps taken:

1. Ensure Stripe.appInfo is being set in the app
2. Run Android Studio and begin observing network requests
3. Make a payment using FlowController API
4. Verify user-agent and x-stripe-client-user-agent request headers include the AppInfo part

[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 │  11.8 MiB │  11.8 MiB │ -102 B │  40.1 MiB │  40.1 MiB │ +12 B 
     arsc │   1.6 MiB │   1.6 MiB │    0 B │   1.6 MiB │   1.6 MiB │   0 B 
 manifest │   2.7 KiB │   2.7 KiB │    0 B │  11.1 KiB │  11.1 KiB │   0 B 
      res │ 697.1 KiB │ 697.1 KiB │    0 B │   1.1 MiB │   1.1 MiB │   0 B 
    asset │  77.8 KiB │  77.8 KiB │   -3 B │ 109.3 KiB │ 109.3 KiB │  -3 B 
    other │  78.3 KiB │  78.3 KiB │   +2 B │   154 KiB │   154 KiB │   0 B 
──────────┼───────────┼───────────┼────────┼───────────┼───────────┼───────
    total │  14.2 MiB │  14.2 MiB │ -103 B │  43.1 MiB │  43.1 MiB │  +9 B 

         │          raw           │           unique            
         ├────────┬────────┬──────┼────────┬────────┬───────────
 DEX     │ old    │ new    │ diff │ old    │ new    │ diff      
─────────┼────────┼────────┼──────┼────────┼────────┼───────────
   files │      3 │      3 │    0 │        │        │           
 strings │ 189052 │ 189052 │    0 │ 170340 │ 170340 │ 0 (+0 -0) 
   types │  32886 │  32886 │    0 │  30879 │  30879 │ 0 (+0 -0) 
 classes │  28488 │  28488 │    0 │  28488 │  28488 │ 0 (+0 -0) 
 methods │ 165500 │ 165500 │    0 │ 160603 │ 160603 │ 0 (+0 -0) 
  fields │ 122103 │ 122103 │    0 │ 121430 │ 121430 │ 0 (+0 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  297 │  297 │  0   
 entries │ 5389 │ 5389 │  0

APK

    compressed    │  uncompressed   │                                                       
─────────┬────────┼─────────┬───────┤                                                       
 size    │ diff   │ size    │ diff  │ path                                                  
─────────┼────────┼─────────┼───────┼───────────────────────────────────────────────────────
 2.7 MiB │ -102 B │ 7.7 MiB │ +12 B │ ∆ classes2.dex                                        
 5.6 KiB │   -3 B │ 5.4 KiB │  -3 B │ ∆ assets/dexopt/baseline.prof                         
   188 B │   +2 B │     6 B │   0 B │ ∆ META-INF/androidx.activity_activity-compose.version 
─────────┼────────┼─────────┼───────┼───────────────────────────────────────────────────────
 2.7 MiB │ -103 B │ 7.7 MiB │  +9 B │ (total)

[skyler-stripe]

LGTM. Could you add some more detail in the testing?

[lng-stripe]

@skyler-stripe done.

[lng-stripe]

r-codeowners?

[brnunes-stripe]

I think a better way is to provide the AppInfo through Dagger, like all other parameters in this constructor. Or, to make things easier, keep this constructor as is and make the default Stripe.appInfo instead of null in line 95

[lng-stripe]

@brnunes-stripe Can you confirm that Stripe.appInfo should be the default value? There are several other cases (e.g. 1, 2) where we're not providing app info, so your proposed change would alter behavior in parts of the library that I'm unfamiliar with.

[lng-stripe]

Maybe a better question is: are there any requests where we should not be providing app info?

[brnunes-stripe]

I think those cases are also bugs, if the user sets the AppInfo I don't see why we wouldn't send it in all requests.

[lng-stripe]

@brnunes-stripe @skyler-stripe Updated primary constructor and CHANGELOG.

[brnunes-stripe]

Thanks!

[lng-stripe]

Rebased master to resolve CHANGELOG merge conflict.