Add tests to verify LoginScreen error states

[DebbieArita]

IMPORTANT: Where possible all PRs must be linked to a Github issue

Fixes #[issue number] or Closes #[issue number]

Engineer Checklist

• I have written Unit tests for any new feature(s) and edge cases for bug fixes
• I have added any strings visible on UI components to the strings.xml file
• I have updated the CHANGELOG.md file for any notable changes to the codebase
• I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the project's style guide
• I have built and run the FHIRCore app to verify my change fixes the issue and/or does not break the app
• I have checked that this PR does NOT introduce breaking changes that require an update to Content and/or Configs? If it does add a sample here or a link to exactly what changes need to be made to the content.

Code Reviewer Checklist

• I have verified Unit tests have been written for any new feature(s) and edge cases
• I have verified any strings visible on UI components are in the strings.xml file
• I have verifed the CHANGELOG.md file has any notable changes to the codebase
• I have verified the solution has been implemented in a configurable and generic way for reuseable components
• I have built and run the FHIRCore app to verify the change fixes the issue and/or does not break the app

[codecov]

Codecov Report

Merging #2589 (eed3732) into main (d84c2c8) will increase coverage by 0.2%.
The diff coverage is 66.6%.

@@            Coverage Diff            @@
##              main   #2589     +/-   ##
=========================================
+ Coverage     65.4%   65.6%   +0.2%     
- Complexity    1101    1135     +34     
=========================================
  Files          213     216      +3     
  Lines         9385    9654    +269     
  Branches      1866    1922     +56     
=========================================
+ Hits          6140    6339    +199     
- Misses        2047    2098     +51     
- Partials      1198    1217     +19     

Flag	Coverage Δ
engine	73.0% <69.6%> (-0.2%)	⬇️
geowidget	62.9% <37.5%> (-0.3%)	⬇️
quest	60.8% <64.8%> (+0.4%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ter/fhircore/engine/configuration/Configuration.kt	25.0% <ø> (ø)
...ngine/configuration/event/EventTriggerCondition.kt	50.0% <0.0%> (ø)
...ircore/engine/configuration/event/EventWorkflow.kt	33.3% <0.0%> (ø)
...ore/engine/configuration/view/DividerProperties.kt	0.0% <0.0%> (ø)
...ngine/configuration/view/PersonalDataProperties.kt	0.0% <0.0%> (ø)
...hircore/engine/configuration/view/RowProperties.kt	0.0% <ø> (ø)
...ine/configuration/view/ViewPropertiesSerializer.kt	23.8% <0.0%> (ø)
...data/remote/fhir/resource/FhirResourceConverter.kt	100.0% <ø> (ø)
...e/data/remote/fhir/resource/FhirResourceService.kt	0.0% <0.0%> (ø)
...hircore/engine/domain/model/FhirResourceConfigs.kt	44.4% <0.0%> (ø)
... and 151 more

... and 13 files with indirect coverage changes