MaxTextureSizeTest.SpecificationTexImage

Bug: angleproject:2690
Change-Id: I19aad34e7213fe34af434f368968a06adc31ab55
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1781617Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>