Revert "Revert "Removing insets controller animation as part of ..."

Revert "Revert "Moving insets animation to StateHandler so that ..."

Revert submission 13823490-revert-13810332-insetcontroller-CLXXLCZAUM

Reason for revert: Fixed original error in ag/13823726
Reverted Changes:
Ie19a3fd90:Revert "Moving insets animation to StateHandler so...
I4eb33772a:Revert "Removing insets controller animation as pa...

Change-Id: I7fb395c51ea99081913bc99515257e98c0a32754