After the decoration is destroyed, we need to resize XdgToplevelClient
to ensure that the scheduled configure event will have correct size.

As is, xdg-toplevel configure events are delayed. When it's actually the
time to send a configure event, XdgToplevelClient will compute the
requested client size from the moveResizeGeometry().

If the moveResizeGeometry() still includes window decorations, the
window will get bigger.

BUG: 444119
(cherry picked from commit 09952e1d)