Vulkan: Enable anisotropy feature when available If anisotropic filtering is used, the feature must be enabled at device creation time. This was missing. Bug: angleproject:2901 Change-Id: I86db55f8b1696dc04eae922b941512f786aa12b8 Reviewed-on: https://chromium-review.googlesource.com/c/1479264 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@google.com>