libcamera/base: Move span to base library

Move span, and adjust the Doxygen exclusion as well.

Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/android/camera_buffer.h

@@ -10,8 +10,7 @@
 #include <hardware/camera3.h>
 
 #include <libcamera/base/class.h>
-
-#include <libcamera/span.h>
+#include <libcamera/base/span.h>
 
 class CameraBuffer final : public libcamera::Extensible
 {

src/android/jpeg/encoder.h

@@ -7,8 +7,9 @@
 #ifndef __ANDROID_JPEG_ENCODER_H__
 #define __ANDROID_JPEG_ENCODER_H__
 
+#include <libcamera/base/span.h>
+
 #include <libcamera/buffer.h>
-#include <libcamera/span.h>
 #include <libcamera/stream.h>
 
 class Encoder

src/android/jpeg/exif.h

@@ -13,8 +13,9 @@
 
 #include <libexif/exif-data.h>
 
+#include <libcamera/base/span.h>
+
 #include <libcamera/geometry.h>
-#include <libcamera/span.h>
 
 class Exif
 {