Add unit testing to workkUtilityView

Testing inflate and visibility states (with both flag states)

bug: 361589193
Test: manually screenshot: https://screenshot.googleplex.com/45HDsyfQfNbgjiE
Flag: com.android.launcher3.work_scheduler_in_work_profile
Change-Id: I57cff03fe3b362e304f52984a2699f8d5b6e653e