CL/VK: Fix frontend cl_mem_flags default access Additionally, if neither of these flags are specified: - CL_MEM_READ_WRITE - CL_MEM_READ_ONLY - CL_MEM_WRITE_WRITE Then we need to bitwise OR the default kernel access flag (according to spec): CL_MEM_READ_WRITE Bug: angleproject:377942757 Change-Id: I5decd05096a834469fdb6bca941284a400b2c69c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6003804 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Austin Annestrand <a.annestrand@samsung.com>