Do not transfer starting window to translucent activity

When starting the "App may not work in split-screen" activity which
is translucent we used to transfer the starting window, and then the
frame was drawn quickly so the starting window from the behind was
removed, leading to a black hole.

Bug: 28094732
Change-Id: I828f0ea8b0465a5a113fd76a82d33177c8faa566