Instead use setTaskbarViewVisible directly. Now that we stash when going to overview, we shouldn't have any launcher state where we need to fade out TaskbarView icons
Test: quick switch from home (follow up CL)
Bug: 194728611
Change-Id: I03e1fa4037b7e8a08494f6b7e065d144c4bc4e1b
TODO:
- Consider delaying animating task bar to stashed towards all apps state until user releasing their finger (tho in this change heuristic is applied for stashing and unstashing respectively)
- Further consolidate some animation logic
Bug: 204220602
Test: manual
Change-Id: I58b4d035fcf65a9f5c68e69c129eae95b89b1c4a