VisD update for the PipAppIconOverlay 2/N

We try to use the same icon size as in Launcher for the app icon overlay
if possible and cap it to 72dp.

Video: http://recall/-/aaaaaabFQoRHlzixHdtY/ha3ebrRk0hAEyU8GSWBrYE
Bug: Bug: 271912318
Test: manual with 4x4 and 5x5 grid, see the video
Change-Id: Ida1ed19157ed613c29318e51d41483177783eb25