Only fade window token on exact rotation change

The rotation animation may apply without rotation degree change
to freeze display for display configuration change. The duration
is shorter so it is unnecessary to fade for covering frozen time.

Bug: 185403130
Test: DisplayContentTests#testHybridRotationAnimation
Test: Toggle dark theme from quick setting.
      The notification shade should not disappear a while.
Change-Id: Ia943a9025bb4ab4a7e804e5e67648c9e8302a77b