Improve pane transitions in bank auth flow

[tillh-stripe]

Summary

This pull request adds proper pane slide transitions in the bank auth flow, and a fade effect for the Stripe logo in the top bar.

We exclude the attach-payment screen from the slide transitions, as it would just cause a slide from one loading indicator to another (we use a fade instead).

(cc @malecks-stripe)

Motivation

Testing

• [ ] Added tests
• [ ] Modified tests
• [ ] Manually verified

Screen recordings

Before

https://github.com/stripe/stripe-android/assets/110940675/660fb0e7-742f-4a44-946a-9774c0d133d7

After

https://github.com/stripe/stripe-android/assets/110940675/fcd53593-3b8f-429f-92dc-295216985f0c

Changelog

[github-actions[bot]]

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 MiB │       2 MiB │   0 B │     4.2 MiB │     4.2 MiB │  0 B 
     arsc │ 1,023.8 KiB │ 1,023.8 KiB │   0 B │ 1,023.7 KiB │ 1,023.7 KiB │  0 B 
 manifest │     2.3 KiB │     2.3 KiB │   0 B │       8 KiB │       8 KiB │  0 B 
      res │   301.5 KiB │   301.5 KiB │   0 B │     455 KiB │     455 KiB │  0 B 
   native │     6.2 MiB │     6.2 MiB │   0 B │    15.8 MiB │    15.8 MiB │  0 B 
    asset │     6.7 KiB │     6.7 KiB │   0 B │     6.5 KiB │     6.5 KiB │  0 B 
    other │    85.5 KiB │    85.5 KiB │ +10 B │   158.7 KiB │   158.7 KiB │  0 B 
──────────┼─────────────┼─────────────┼───────┼─────────────┼─────────────┼──────
    total │     9.6 MiB │     9.6 MiB │ +10 B │    21.6 MiB │    21.6 MiB │  0 B 

 DEX     │ old   │ new   │ diff      
─────────┼───────┼───────┼───────────
   files │     1 │     1 │ 0         
 strings │ 21305 │ 21305 │ 0 (+0 -0) 
   types │  6770 │  6770 │ 0 (+0 -0) 
 classes │  5559 │  5559 │ 0 (+0 -0) 
 methods │ 31121 │ 31121 │ 0 (+0 -0) 
  fields │ 18141 │ 18141 │ 0 (+0 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  164 │  164 │  0   
 entries │ 3392 │ 3392 │  0

APK

``` compressed │ uncompressed │ ──────────┬───────┼───────────┬──────┤ size │ diff │ size │ diff │ path ──────────┼───────┼───────────┼──────┼──────────────────────── 28.3 KiB │ +5 B │ 62.6 KiB │ 0 B │ ∆ META-INF/CERT.SF 25.1 KiB │ +5 B │ 62.5 KiB │ 0 B │ ∆ META-INF/MANIFEST.MF ──────────┼───────┼───────────┼──────┼──────────────────────── 53.4 KiB │ +10 B │ 125.1 KiB │ 0 B │ (total) ```

[malecks-stripe]

Looking good! I noticed in the 'after' that the bank logos load simultaneously, vs. the 'before' where a few logos loaded first and then the rest loaded afterward. Is that a change related to this PR? Or just happened to be the case during the recording?