Remove final call to Dep.get(FalsingManager.class)

CarStatusBar had one last reference in its dump method.
FalsingManager, however, directly registers itself with the
DumpController, so this call is redundant.

Bug: 136279712
Test: atest SystemUITests
Change-Id: I3731e7ecac2f147e5d3967d4219f22d17e810843