Explicitly set animation and timings for split cancel button

* Mismatched animation durations were causing recents task
thumbnails to flash in at the end.
* Following a similar pattern started at ag/26378432, except
here we manually call all the steps to create launcherState
animation

Fixes: 321863575
Test: Repro steps from bug no longer occur.
Tested on phone and large screen, workspace, overview and all apps

Change-Id: I02696c0470bf4cfe6a278f0a2bc0786367a9fe37
(cherry picked from commit aeb9595b)