ozone/wayland: Make surface ownership transferrable

This is required to be able to transfer WaylandWindow's surface
ownership over to WindowDragController in case it gets destroyed in the
middle of a window/tab dragging DnD session. Refer to [1] and [2] for
more details.

Bug: 896640

[1] https://chromium-review.googlesource.com/c/chromium/src/+/2267637
[2] https://docs.google.com/document/d/1s6OwTi_WC-pS21WLGQYI39yw2m42ZlVolUXBclljXB4/edit?usp=sharing

R=msisov@igalia.com

Change-Id: I69360ab208e8754625b5fcd37614530589f0d5c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2267618
Commit-Queue: Nick Yamane <nickdiego@igalia.com>
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Cr-Commit-Position: refs/heads/master@{#782992}