Vulkan: Issue when drawing with a texture and rebinding after. Added 2 tests in StateChangeTest.cpp to validate the behavior and reproduce the issue I saw in dEQP. Bug: angleproject:2479 Change-Id: I29c3da0474ec2b13a10fc266284cb19a07675da2 Reviewed-on: https://chromium-review.googlesource.com/1025951 Commit-Queue: Luc Ferron <lucferron@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>