Delay EGLQueryContext render buffer change According to the EGL spec, EGL_RENDER_BUFFER of a context should change after eglSwapBuffers is called if eglSurfaceAttrib changes. Refine ANGLE implemnetation to delay the render buffer change. Bug: angleproject:375528202 Change-Id: Ida7736a09e3a83223a529dbfad48e0f952f91a38 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5982241 Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>