Merge "Use new GrVkBackendContext::Create api"

    auto canPresent = [](VkInstance, VkPhysicalDevice, uint32_t) { return true; };

    mBackendContext.reset(GrVkBackendContext::Create(&mPresentQueueIndex, canPresent));

    mBackendContext.reset(GrVkBackendContext::Create(vkGetInstanceProcAddr, vkGetDeviceProcAddr,

            &mPresentQueueIndex, canPresent));

    // Get all the addresses of needed vulkan functions

    VkInstance instance = mBackendContext->fInstance;