Ensure accessibility updates during the recents animation

- There is no focused window (only the input consumer) during the
  recents animation so depending on when the window changes are
  computed for accessibility, it is possible that accessibility will
  not updated to reflect Launcher being visible.  In these cases
  where we are swiping up to home, we already prevent input from
  going to the app (via the input consumer) and the home app should
  be considered for accessibility.

Bug: 183238051
Test: Enable live tile, swipe up to enter Overview repeatedly
Change-Id: I2503010c9e5dd1898f9c21ff9a9ee91c1be0d16f