Adjust STENCIL_INDEX8 caps * Fixed a typo in GetSizedFormatInternal * Required texturing for OES_texture_stencil8 * Marked all depth/stencil formats as not blendable * Fixed frontend and GL texture caps for GL_STENCIL_INDEX8 Bug: angleproject:3231 Change-Id: Ie91e4bb4e8ab56d39dc1270487380b0bfce25b08 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4194169 Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>