Fix Maps PiP entrance to not bounce down and up

Quickstep hides itself for moment, which resets setLauncherKeepClearAreaHeight
and causes the bounce. Adding delay prevents the movement to trigger too soon.

Bug: 282068601
Test: manually, enter PiP in Maps
Test: before http://recall/-/ekEuGtt9d9HWqkUtAzpHx8/c0eQkqhMV58ESQTwP6UKSm
Test: after http://recall/-/ekEuGtt9d9HWqkUtAzpHx8/gCTmeKSerYbRKsHM5ZsVjp

Change-Id: Ic070f63be805ef249f270a6dd1b2180c08e0fa0c