Tests in QuestionnaireViewModel pass when they should pass

[omarismail94]

Our QuestionnaireViewModelTest is passing tests that should be failing (the worst kind).

The code is making a cast that should never succeed:

viewModel.questionnaireStateFlow.value as DisplayMode.EditMode

but that is being called inside viewModel.runViewModelBlocking, which seems to run after the test completes. The custom function runs on the main dispatcher, but that does not block the test from completing.

https://github.com/google/android-fhir/blob/master/datacapture/src/test/java/com/google/android/fhir/datacapture/QuestionnaireViewModelTest.kt#L4043-L4057