GLES1: state: Define / initialize GLES1-specific states Contains definitions of GLES1-specific states such as material / lighting. Tweaked the Color class for easier copying to uniforms / reading as a float array. This CL also adds the GLES1-specific state in GLES1State, which is then part of the State class and is initialized to the spec's values if the context major version is ES 1. + Some clang-format BUG=angleproject:2306 Change-Id: I7fc3bd9a22ebf0ffcd98d931d0176f21e17b1c5c Reviewed-on: https://chromium-review.googlesource.com/936424 Commit-Queue: Lingfeng Yang <lfy@google.com> Reviewed-by: Corentin Wallez <cwallez@chromium.org>