No longer create a GrVkInterface in the VulkanManger.

        }

        return vkGetInstanceProcAddr(instance, proc_name);

    };

    auto interface =

        sk_make_sp<GrVkInterface>(getProc, mInstance, mDevice, extensionFlags);

    GrVkBackendContext backendContext;

    backendContext.fInstance = mInstance;

    backendContext.fMinAPIVersion = VK_MAKE_VERSION(1, 0, 0);

    backendContext.fExtensions = extensionFlags;

    backendContext.fFeatures = featureFlags;

    backendContext.fInterface = std::move(interface);

    backendContext.fGetProc = std::move(getProc);

    backendContext.fOwnsInstanceAndDevice = false;

    // create the command pool for the command buffers