Prevent multiple invocations of final result

[awush-stripe]

Summary

Prevent multiple invocations of the final result, which could trigger multiple calls to the /verify_frames endpoint

Motivation

Elevated 500s on the /verify_frames endpoint

Testing

• Added tests
• Modified tests
• Manually verified

Changelog

[github-actions]

Diffuse output:

OLD: identity-example-release-base.apk (signature: none)
NEW: identity-example-release-pr.apk (signature: none)

          │           compressed           │         uncompressed         
          ├───────────┬───────────┬────────┼──────────┬──────────┬────────
 APK      │ old       │ new       │ diff   │ old      │ new      │ diff   
──────────┼───────────┼───────────┼────────┼──────────┼──────────┼────────
      dex │   1.7 MiB │   1.7 MiB │ +376 B │  3.7 MiB │  3.7 MiB │ +264 B 
     arsc │   1.1 MiB │   1.1 MiB │    0 B │  1.1 MiB │  1.1 MiB │    0 B 
 manifest │     2 KiB │     2 KiB │    0 B │  7.1 KiB │  7.1 KiB │    0 B 
      res │ 382.4 KiB │ 382.4 KiB │    0 B │  580 KiB │  580 KiB │    0 B 
   native │   6.1 MiB │   6.1 MiB │    0 B │ 15.6 MiB │ 15.6 MiB │    0 B 
    asset │   5.7 KiB │   5.7 KiB │    0 B │  5.4 KiB │  5.4 KiB │    0 B 
    other │  28.8 KiB │  28.8 KiB │    0 B │   30 KiB │   30 KiB │    0 B 
──────────┼───────────┼───────────┼────────┼──────────┼──────────┼────────
    total │   9.3 MiB │   9.3 MiB │ +376 B │ 20.9 MiB │ 20.9 MiB │ +264 B 

 DEX     │ old   │ new   │ diff        
─────────┼───────┼───────┼─────────────
   files │     1 │     1 │  0          
 strings │ 18814 │ 18814 │  0 (+3 -3)  
   types │  6622 │  6622 │  0 (+0 -0)  
 classes │  5693 │  5693 │  0 (+0 -0)  
 methods │ 29240 │ 29240 │  0 (+0 -0)  
  fields │ 14574 │ 14578 │ +4 (+12 -8) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  259 │  259 │  0   
 entries │ 4740 │ 4740 │  0

APK

    compressed    │   uncompressed   │               
─────────┬────────┼─────────┬────────┤               
 size    │ diff   │ size    │ diff   │ path          
─────────┼────────┼─────────┼────────┼───────────────
 1.7 MiB │ +376 B │ 3.7 MiB │ +264 B │ ∆ classes.dex 
─────────┼────────┼─────────┼────────┼───────────────
 1.7 MiB │ +376 B │ 3.7 MiB │ +264 B │ (total)

DEX

STRINGS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   18814 │ 18814 │ 0 (+3 -3) 
  + com.stripe.android.camera.framework.ResultAggregator_onResult_2_1_1
  + com.stripe.android.camera.framework.ResultAggregator_onResult_2_1_2
  + ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:45f914f,r8-mode:compatibility,version:3.3.83}
  
  - com.stripe.android.camera.framework.ResultAggregator_onResult_2_1
  - com.stripe.android.camera.framework.ResultAggregator_onResult_2_2_1
  - ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:27a7afc,r8-mode:compatibility,version:3.3.83}
  

FIELDS:

   old   │ new   │ diff        
  ───────┼───────┼─────────────
   14574 │ 14578 │ +4 (+12 -8) 
  + com.stripe.android.camera.framework.ResultAggregator o: c
  + com.stripe.android.camera.framework.ResultAggregator r: boolean
  + com.stripe.android.camera.framework.ResultAggregator s: u
  + com.stripe.android.camera.framework.ResultAggregator t: k
  + com.stripe.android.identity.camera.IdentityAggregator u: boolean
  + q5.t n: b
  + q5.t o: ResultAggregator
  + q5.t q: Object
  + q5.t r: int
  + q5.t t: ResultAggregator
  + q5.t u: Object
  + q5.t v: Object
  
  - com.stripe.android.camera.framework.ResultAggregator o: boolean
  - com.stripe.android.camera.framework.ResultAggregator r: u
  - com.stripe.android.camera.framework.ResultAggregator s: k
  - com.stripe.android.identity.camera.IdentityAggregator t: boolean
  - q5.t n: Object
  - q5.t o: int
  - q5.t q: ResultAggregator
  - q5.t r: Object