Fix input infos are inconsistent between WMS and InputFlinger (1/2)

In single focus system, we would expect the focused display could be
changed when receiving a key event.

The way we update window infos from WMS to InputFlinger is using
SurfaceControl.Transaction, and we would expect the api
'syncInputTransactions' could wait until all window infos update to
InputFlinger.

This would collect all input transactions from all displays into one
to make sure all input windows could be sync at same time.

- Change 'updateInputWindowsImmediately' that we could update the input
  transation and merge it into the passing Transaction that could be
  collected and applied later.
- Wait for 'isAnimationScheduled' to make sure the pending trasaction
  had been applied before it update the input transaction.
- Rename 'setInputWindow' to 'displayRemoved' to match the function
  more properly.

Bug: 150250453
Test: atest --rerun-until-failure 100 WindowFocusTests#testMovingDisplayToTopByKeyEvent
Test: atest --rerun-until-failure 10 WindowFocusTests

Change-Id: Id06c70bfe76e8c8a0cd50a8ae66b38b444a9d0c2