Move more implementations to state flow.

[jaynewstrom-stripe]

Summary

I'm trying to remove collectAsState(null), these last few are tricky, and if I replace collectAsState(null) with collectAsState() after this change, it causes PaymentSheet to break. So I'm just getting more of the pre work done 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 │   3.9 MiB │   3.9 MiB │ -486 B │   8.6 MiB │   8.6 MiB │ +88 B 
     arsc │   2.2 MiB │   2.2 MiB │    0 B │   2.2 MiB │   2.2 MiB │   0 B 
 manifest │     5 KiB │     5 KiB │    0 B │  25.2 KiB │  25.2 KiB │   0 B 
      res │ 907.5 KiB │ 907.5 KiB │    0 B │   1.4 MiB │   1.4 MiB │   0 B 
   native │   2.6 MiB │   2.6 MiB │    0 B │     6 MiB │     6 MiB │   0 B 
    asset │   2.9 MiB │   2.9 MiB │   -1 B │   2.9 MiB │   2.9 MiB │  -1 B 
    other │   194 KiB │   194 KiB │   +6 B │ 423.6 KiB │ 423.6 KiB │   0 B 
──────────┼───────────┼───────────┼────────┼───────────┼───────────┼───────
    total │  12.7 MiB │  12.7 MiB │ -481 B │  21.6 MiB │  21.6 MiB │ +87 B 

 DEX     │ old   │ new   │ diff       
─────────┼───────┼───────┼────────────
   files │     1 │     1 │  0         
 strings │ 43007 │ 43007 │  0 (+1 -1) 
   types │ 14756 │ 14756 │  0 (+0 -0) 
 classes │ 12461 │ 12461 │  0 (+0 -0) 
 methods │ 61021 │ 61021 │  0 (+2 -2) 
  fields │ 40303 │ 40304 │ +1 (+2 -1) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  242 │  242 │  0   
 entries │ 6028 │ 6028 │  0

APK

    compressed     │   uncompressed    │                               
──────────┬────────┼───────────┬───────┤                               
 size     │ diff   │ size      │ diff  │ path                          
──────────┼────────┼───────────┼───────┼───────────────────────────────
  3.9 MiB │ -486 B │   8.6 MiB │ +88 B │ ∆ classes.dex                 
 49.4 KiB │   +5 B │ 116.6 KiB │   0 B │ ∆ META-INF/MANIFEST.MF        
  1.2 KiB │   +2 B │   1.2 KiB │   0 B │ ∆ META-INF/CERT.RSA           
  7.4 KiB │   -1 B │   7.2 KiB │  -1 B │ ∆ assets/dexopt/baseline.prof 
 52.7 KiB │   -1 B │ 116.7 KiB │   0 B │ ∆ META-INF/CERT.SF            
──────────┼────────┼───────────┼───────┼───────────────────────────────
    4 MiB │ -481 B │   8.8 MiB │ +87 B │ (total)

DEX

STRINGS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   43007 │ 43007 │ 0 (+1 -1) 
  
  + ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:537db9b,r8-mode:full,version:8.3.37}
  
  - ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:4952457,r8-mode:full,version:8.3.37}
  

METHODS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   61021 │ 61021 │ 0 (+2 -2) 
  
  + G6.k v(f, m0, m0, m0, q, k, int, int)
  + Q8.P <init>(f, f, h)
  
  - G6.k v(f, m0, m0, f, q, k, int, int)
  - Q8.P <init>(f, f, f)
  

FIELDS:

   old   │ new   │ diff       
  ───────┼───────┼────────────
   40303 │ 40304 │ +1 (+2 -1) 
  
  + c7.e V: e
  + c7.i e: b
  
  - c7.i e: P

[jaynewstrom-stripe]

I need to rebase on #8411