[Ozone/X11]Use NOTIFICATION window type for bubbles

_NET_WM_WINDOW_TYPE_DIALOG does not work because DIALOG has pop in
animation on GNOME, is transient and easily dismissed while chrome UI
sometimes wants to play fade-in, and keep them persisted.

Set supports_subwindows_as_accelerated_widgets because it is natively
supported.

Bug: 330385355
Change-Id: I8a2e323ca202f04b263848f15b18d8bad2645883
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5426390


Reviewed-by: Maksim Sisov <msisov@igalia.com>
Commit-Queue: Kramer Ge <fangzhoug@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283173}