Merge "vulkan: Don't dequeue in AcquireNextImageKHR if in shared mode" into oc-dev am: fc812651

        timeout != UINT64_MAX,

        "vkAcquireNextImageKHR: non-infinite timeouts not yet implemented");

    if (swapchain.shared) {

        // In shared mode, we keep the buffer dequeued all the time, so we don't

        // want to dequeue a buffer here. Instead, just ask the driver to ensure

        // the semaphore and fence passed to us will be signalled.

        *image_index = 0;

        result = GetData(device).driver.AcquireImageANDROID(

                device, swapchain.images[*image_index].image, -1, semaphore, vk_fence);

        return result;

    }

    ANativeWindowBuffer* buffer;

    int fence_fd;

    err = window->dequeueBuffer(window, &buffer, &fence_fd);