Added UI tests for the Submenu About settings.

[KMaragh]

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• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• 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

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[codecov-io]

Codecov Report

Merging #6161 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #6161      +/-   ##
============================================
- Coverage     18.98%   18.93%   -0.06%     
  Complexity      436      436              
============================================
  Files           291      289       -2     
  Lines         11272    11298      +26     
  Branches       1530     1542      +12     
============================================
- Hits           2140     2139       -1     
- Misses         8969     8995      +26     
- Partials        163      164       +1

Impacted Files	Coverage Δ	Complexity Δ
...ix/trackingprotection/TrackingProtectionOverlay.kt	96.87% <0%> (-0.19%)	9% <0%> (ø)
...rc/main/java/org/mozilla/fenix/FenixApplication.kt	4.71% <0%> (-0.1%)	2% <0%> (ø)
.../bookmarks/viewholders/BookmarkFolderViewHolder.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...kmarks/selectfolder/SelectBookmarkFolderAdapter.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
.../settings/search/EditCustomSearchEngineFragment.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...a/fenix/settings/DefaultBrowserSettingsFragment.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...lla/fenix/components/toolbar/BrowserToolbarView.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
...main/java/org/mozilla/fenix/components/Services.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
.../src/main/java/org/mozilla/fenix/utils/Settings.kt	72.77% <0%> (ø)	19% <0%> (ø)	⬇️
...in/java/org/mozilla/fenix/search/SearchFragment.kt	0% <0%> (ø)	0% <0%> (ø)	⬇️
... and 27 more

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[AaronMT]

Great start @KMaragh – just a couple questions and some cleanup. As well, make sure to enable in Android Studio the following:
and then run Analyze -> Inspect Code -> Uncommited Files to check for any Kotlin style issues

[rpappalax]

after squash, rebase and nit fixes from Aaron and I, we can merge this 👍

[KMaragh]

Great start @KMaragh – just a couple questions and some cleanup. As well, make sure to enable in Android Studio the following:
and then run Analyze -> Inspect Code -> Uncommited Files to check for any Kotlin style issues

Thanks for the suggestions! I made the changes, but I can't seem to close out this review so I will ask Richard to close.

@KMaragh has reviewed and just need to unblock this so we can merge. thanks!