The implementation of eglChooseConfig does not match the
specification for attributes not provided by the calling function.  It
is supposed to use the default value and match semantics, per the
specification.  This is fine for many attributes (where the value in
the EGLConfig doesn't matter).  Currently, this affects the following
attributes:

- EGL_COLOR_BUFFER_TYPE
- EGL_LEVEL
- EGL_RENDERABLE_TYPE
- EGL_SURFACE_TYPE
- EGL_TRANSPARENT_TYPE
- EGL_OPTIMAL_SURFACE_ORIENTATION_ANGLE
- EGL_COLOR_COMPONENT_TYPE_EXT

This change causes 55 of 65 of the dEQP-EGL.functional.choose_config.* tests
to start passing.

Bug: angleproject:3172
Change-Id: I287af5ba7d296694d9a78ded5d1e3bc4e7043d03
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1506696
Commit-Queue: Ian Elliott <ianelliott@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>