Implementation of EGL_IMG_context_priority was missing attribute check in ValidateQueryContext Add test case. Test: angle_end2end_test --gtest_filter=EGLCreateContextAttribsTest Bug: angleproject:5746 Change-Id: Idf5df29fcb343d969a031675b6c5985a9be0a705 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2752891 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>
