Hide PiP menu when expanding

When expanding the PiP window, hide first the close/resize button/handle
if applicable to eliminate possible jankiness.

Vide: http://go/recall/-/aaaaaabFQoRHlzixHdtY/fNFmYOXaILVu0OpHtBNDey
Bug: 157303621
Test: manually expand PiP window
Change-Id: Ic15173f96fc02e38728957e64bb8d90cada8e974