Fix compressed formats validation with TEXTURE_3D Bug: angleproject:4385 Change-Id: Ibc1b482ec851d8076aacad84ab67fe20a745c122 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2045512 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>