Add test prefix to all UI Tests

[pixlwave]

GitHub actions don't report failed tests if they come from the defaultTestSuite property as compared to explicitly having a test prefix on the name.

The one downside to this is that the compiler won't remind us to add tests when a new mock screen state case is added to the enum. However having knowledge of failing tests is much more valuable and when developing we will be able to run a single test instead of being required to all tests for a specific screen even if only 1 test was changed.