This helper method will also transition the Image to the correct read
layout. We will need to revisit the implementation when working on
simulatenous read.

Bug: angleproject:2539
Change-Id: Id61404460f3ef0dbb054e6ac2dfc0b59adb78402
Reviewed-on: https://chromium-review.googlesource.com/1108378
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Luc Ferron <lucferron@chromium.org>