Enforce HTTPs for all network requests.

[jaynewstrom-stripe]

This is more or less a manual revert of #4851.

Summary

This functionality is no longer needed, as the reason it was introduced has since changed.

[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 │     4 MiB │     4 MiB │  -4 B │   8.7 MiB │   8.7 MiB │ +20 B 
     arsc │   2.3 MiB │   2.3 MiB │   0 B │   2.3 MiB │   2.3 MiB │   0 B 
 manifest │   5.1 KiB │   5.1 KiB │   0 B │  25.6 KiB │  25.6 KiB │   0 B 
      res │ 918.5 KiB │ 918.5 KiB │   0 B │   1.5 MiB │   1.5 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 │   195 KiB │   195 KiB │  -8 B │ 428.4 KiB │ 428.4 KiB │   0 B 
──────────┼───────────┼───────────┼───────┼───────────┼───────────┼───────
    total │  12.8 MiB │  12.8 MiB │ -13 B │  21.8 MiB │  21.8 MiB │ +19 B 

 DEX     │ old   │ new   │ diff      
─────────┼───────┼───────┼───────────
   files │     1 │     1 │ 0         
 strings │ 43507 │ 43507 │ 0 (+1 -1) 
   types │ 14958 │ 14958 │ 0 (+0 -0) 
 classes │ 12642 │ 12642 │ 0 (+0 -0) 
 methods │ 61906 │ 61906 │ 0 (+1 -1) 
  fields │ 40832 │ 40832 │ 0 (+1 -1) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  242 │  242 │  0   
 entries │ 6043 │ 6043 │  0

APK

    compressed    │   uncompressed    │                                           
──────────┬───────┼───────────┬───────┤                                           
 size     │ diff  │ size      │ diff  │ path                                      
──────────┼───────┼───────────┼───────┼───────────────────────────────────────────
 52.9 KiB │  -5 B │ 117.2 KiB │   0 B │ ∆ META-INF/CERT.SF                        
    4 MiB │  -4 B │   8.7 MiB │ +20 B │ ∆ classes.dex                             
 49.6 KiB │  -3 B │ 117.1 KiB │   0 B │ ∆ META-INF/MANIFEST.MF                    
    271 B │  -1 B │     120 B │   0 B │ ∆ META-INF/version-control-info.textproto 
  7.4 KiB │  -1 B │   7.2 KiB │  -1 B │ ∆ assets/dexopt/baseline.prof             
  1.2 KiB │  +1 B │   1.2 KiB │   0 B │ ∆ META-INF/CERT.RSA                       
──────────┼───────┼───────────┼───────┼───────────────────────────────────────────
  4.1 MiB │ -13 B │     9 MiB │ +19 B │ (total)

DEX

STRINGS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   43507 │ 43507 │ 0 (+1 -1) 
  
  + ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:2c29aa1,r8-mode:full,version:8.3.37}
  
  - ~~R8{backend:dex,compilation-mode:release,has-checksums:false,min-api:21,pg-map-id:e6db348,r8-mode:full,version:8.3.37}
  

METHODS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   61906 │ 61906 │ 0 (+1 -1) 
  
  + T4.T <init>(HttpsURLConnection)
  
  - T4.T <init>(HttpURLConnection)
  

FIELDS:

   old   │ new   │ diff      
  ───────┼───────┼───────────
   40832 │ 40832 │ 0 (+1 -1) 
  
  + T4.T S: HttpsURLConnection
  
  - T4.T S: HttpURLConnection

[amk-stripe]

Do we also need to update the manifest?

[jaynewstrom-stripe]

Manifest change was reverted here @amk-stripe #8683