For #18877 - Support updated PromptRequest AC APIs

[Mugurell]

This issue stemming from a race condition is fully resolved in AC by adding
support for having multiple prompts at a time.
Fenix needs just a small change to support the AC refactoring from mozilla-mobile/android-components#10273

Pull Request checklist

• Tests: This PR includes thorough tests or an explanation of why it does not
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features. In addition, it includes a screenshot of a successful accessibility scan to ensure no new defects are added to the product.

To download an APK when reviewing a PR:

1. click on Show All Checks,
2. click Details next to "Taskcluster (pull_request)" after it appears and then finishes with a green checkmark,
3. click on the "Fenix - assemble" task, then click "Run Artifacts".
4. the APK links should be on the left side of the screen, named for each CPU architecture

[mergify]

This pull request has conflicts when rebasing. Could you fix it @Mugurell? 🙏

[Amejia481]

We are trying to figure out why these ui tests are failing locally and on CI

[Amejia481]

It looks like the SaveLoginPrompt is getting auto dismiss when loading and the tests doesn't expect the prompt gets dismissed

[codecov-commenter]

Codecov Report

Merging #19767 (494e9f7) into master (eaf74a1) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master   #19767      +/-   ##
============================================
- Coverage     35.40%   35.39%   -0.01%     
+ Complexity     1649     1648       -1     
============================================
  Files           545      545              
  Lines         22097    22097              
  Branches       3280     3281       +1     
============================================
- Hits           7823     7822       -1     
- Misses        13371    13372       +1     
  Partials        903      903              

Impacted Files	Coverage Δ
...main/java/org/mozilla/fenix/share/ShareFragment.kt	0.00% <0.00%> (ø)
...rg/mozilla/fenix/settings/account/AccountUiView.kt	34.14% <0.00%> (-2.44%)	⬇️
...in/java/org/mozilla/fenix/perf/NavGraphProvider.kt	62.50% <0.00%> (ø)

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