Remove Dependency.get from NavigationBar.

Fixes flaky tests as it relates to historical interaction between
Dependency.get and DumpManager.

Removes the reliance on CommandQueue in NavigationBarTest and adds
to the CommandQueue test in its place.

Fixes: 199774897, 195135693
Test: atest SystemUITests
Change-Id: I2db7b423bd05a247e021a119a2f9e66aa2b98008