Always log Link AB test exposures

[mats-stripe]

Summary

Always log Link AB test exposures, instead of only when Link is enabled.

Motivation

https://stripe.slack.com/archives/C08P60QCL1W/p1754362038470109

Testing

Unit tests updated

Changelog

N/a

[github-actions]

Diffuse output:

OLD: identity-example-release-base.apk (signature: V1, V2)
NEW: identity-example-release-pr.apk (signature: V1, V2)

          │          compressed          │         uncompressed         
          ├───────────┬───────────┬──────┼───────────┬───────────┬──────
 APK      │ old       │ new       │ diff │ old       │ new       │ diff 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
      dex │   2.1 MiB │   2.1 MiB │  0 B │   4.3 MiB │   4.3 MiB │  0 B 
     arsc │     1 MiB │     1 MiB │  0 B │     1 MiB │     1 MiB │  0 B 
 manifest │   2.3 KiB │   2.3 KiB │  0 B │     8 KiB │     8 KiB │  0 B 
      res │ 302.9 KiB │ 302.9 KiB │  0 B │   457 KiB │   457 KiB │  0 B 
   native │   7.9 MiB │   7.9 MiB │  0 B │  19.3 MiB │  19.3 MiB │  0 B 
    asset │   7.7 KiB │   7.7 KiB │  0 B │   7.4 KiB │   7.4 KiB │  0 B 
    other │  95.7 KiB │  95.7 KiB │ +1 B │ 183.5 KiB │ 183.5 KiB │  0 B 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
    total │  11.4 MiB │  11.4 MiB │ +1 B │  25.3 MiB │  25.3 MiB │  0 B 

 DEX     │ old   │ new   │ diff      
─────────┼───────┼───────┼───────────
   files │     1 │     1 │ 0         
 strings │ 20684 │ 20684 │ 0 (+0 -0) 
   types │  6503 │  6503 │ 0 (+0 -0) 
 classes │  5267 │  5267 │ 0 (+0 -0) 
 methods │ 31502 │ 31502 │ 0 (+0 -0) 
  fields │ 18232 │ 18232 │ 0 (+0 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  164 │  164 │  0   
 entries │ 3648 │ 3648 │  0

APK

   compressed    │   uncompressed   │                                           
──────────┬──────┼───────────┬──────┤                                           
 size     │ diff │ size      │ diff │ path                                      
──────────┼──────┼───────────┼──────┼───────────────────────────────────────────
    272 B │ +2 B │     120 B │  0 B │ ∆ META-INF/version-control-info.textproto 
 29.2 KiB │ +2 B │  64.6 KiB │  0 B │ ∆ META-INF/CERT.SF                        
 25.9 KiB │ -2 B │  64.5 KiB │  0 B │ ∆ META-INF/MANIFEST.MF                    
  1.2 KiB │ -1 B │   1.2 KiB │  0 B │ ∆ META-INF/CERT.RSA                       
──────────┼──────┼───────────┼──────┼───────────────────────────────────────────
 56.5 KiB │ +1 B │ 130.5 KiB │  0 B │ (total)