Vulkan: Add gles1 conformance support. For Khnoros CTS1 support, ANGLE needs to add conformant and rendererType for OpenGL ES1 version. Bug: angleproject:4457 Change-Id: I58ac4672352d3d42e4b8403b80f86154b6a76edc Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2160515 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>