Disable recents gesture when split animation running in shell

* Pass in SysUiState flag to disable and re-enable system
gestures in TouchInteractionService.
* We disable gestures on any transitions that StageCoordinator
itself starts
* We re-enable on the finishCallback of the tranisiton for success
cases or anywhere else downstream of startAnimation() where we
return early. We also re-enable on all places the split unsupported
toast is currently shown.

Bug: 286509643
Test: Invoked split in various ways and immediately swiping up after
split is created doesn't repro bug

Change-Id: I50d52fb8b099a6a000373e04d9a6016bd18e7169