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The new API allows passing/getting the old/new image layouts to
do proper image layout transitions. ExportSignalSemaphoreOpaqueFD
is deprecated.

Bug: dawn:200, 976495
Change-Id: Icbdd354bf5d8231c16b1bbc64317bcd158e0c135
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2451710Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814221}