Fixing timeout caused by non executed animation

The problem became apparent after a springboard activity
called another activity and a moveTaskToFront got requested.

This issue is similar to ag/1647538 where an
ExecuteAppTransision was missing and a timeout occured.

Bug: 33307856
Test: Start PlayStore on ARC++ several times to see that
it shows up immediately and not after a considerable delay.

Change-Id: I25b63bd65385a4ad45bbb1803ae92fb48fe5fe4d
(cherry picked from commit 06f78e83d1010fa5420c7fe88a0b27eb3651bdc3)