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There is currently a GetSurface() api but it only gives
access to the plane 0.

This new api GetPlaneSurface allows to get access to any
planes to support YUV formats.

Bug: 1043007
Test: ./out/ozone_build/ozone_unittests
Change-Id: I4116affcf168cdaeebf3b405234aa3e5f55cc30f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2032060Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Commit-Queue: Julien Isorce <julien.isorce@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740986}