Account for last animated-to-sleep state when calculating nav visibility

- mAnimatedToSleep is true for the duration of the animation to sleep,
  but the last nav visibility is incorrect if it doesn't account for
  the last animated state, which results in the showing the bar to be
  ignored.

Bug: 199536651
Test: atest StatusBarKeyguardViewManagerTest
Test: Enable aod, power off, power on before it fully dozes
Change-Id: I6d3f7f92be567bb561f8cfc62a367c97b00c799d