This change makes sure that resource being set to UnorderedAccessView slot is
not bound on ShaderResourceView and resource being set to shader resource slot
is not bound on UnorderedAccessView.

Bug: angleproject:2768

Change-Id: I52fc5bf5e76ccf8be61c59b2195459728f95e536
Reviewed-on: https://chromium-review.googlesource.com/1201324Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jiajia Qin <jiajia.qin@intel.com>