Fix libcamera compilation

device/libcamera/libcamera.hh

@@ -5,8 +5,16 @@ extern "C" {
 #include <linux/v4l2-subdev.h>
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdlib.h>
+
+#include "device/device.h"
+#include "device/buffer_list.h"
+#include "device/buffer.h"
 };
 
+#include <optional>
+#include <memory>
+
 #include <libcamera/controls.h>
 #include <libcamera/control_ids.h>
 #include <libcamera/property_ids.h>