libcamera: libcamera: Add missing includes

Let's add direct includes for classes currently included indirectly,
through other header files.

Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/camera.cpp

@@ -9,6 +9,11 @@
 
 #include <array>
 #include <atomic>
+#include <ios>
+#include <memory>
+#include <optional>
+#include <set>
+#include <sstream>
 
 #include <libcamera/base/log.h>
 #include <libcamera/base/thread.h>