This change explicitly allows for TaskbarStashControllerTest to control
whether the navigation bar is visible in setup wizard or not. This was
needed because two test cases rely on the navbar being visible/not
visible and would otherwise lead to a test failure.
Fix: 420737945
Test: atest NexusLauncherTests:com.android.launcher3.taskbar.TaskbarStashControllerTest
Flag: EXEMPT bugfix
Change-Id: Ie0da668f0d37753e38cd4dcc17532aed761f0f7b
Saumya Prakash
2ee6ac9a0c