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In particular, the RGBX8 format doesn't seem to be supported. RGBA
ordering support also seems to vary depending on device.

Bug: 1127558
Test: can launch lacros
Change-Id: Iff175b455444b6cfc3cc5c487080b5d42a4b2bc1
Fixed: 2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2409532
Commit-Queue: Eliot Courtney <edcourtney@chromium.org>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806602}