[BITAU-177] Add Default for accountDomain

[brant-livefront]

🎟️ Tracking

BITAU-177

📔 Objective

In the Authenticator app, we use accountEmail and accountDomain to format the user's section heading to show them where the specifics codes came from in the PM app. As we were building that, I noticed that accountEmail should really never be nil and made the change to fetch it so that it always has a value. Similarly, account.settings.environmentUrls?.webVaultHost should likely not be nil, but elsewhere in the app we additionally add a fallback value of Constants.defaultWebVaultHost.

I had made a Jira ticket to move both accountEmail and accountDomain to be non-optional in our data model. However, I don't think we need to take that drastic a step and it would cause issues with the temporary item implementation. But I did want to put up this PR to make sure we provide the fallback value just in case.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.52%. Comparing base (4fa75b0) to head (ab5f8f6).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1088   +/-   ##
=======================================
  Coverage   89.52%   89.52%           
=======================================
  Files         677      677           
  Lines       42703    42703           
=======================================
+ Hits        38229    38231    +2     
+ Misses       4474     4472    -2     

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