src: android: Rectify internal header's #include path

libcamera internal headers are not installed system-wide. Hence, any
inclusion of internal headers should follow the #include directive
form:
	#include "libcamera/internal/header.h"

This was not the case for a few of the class in android HAL. Fix them.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/android/mm/generic_camera_buffer.cpp

@@ -7,7 +7,7 @@
 
 #include "../camera_buffer.h"
 
-#include <libcamera/internal/buffer.h>
+#include "libcamera/internal/buffer.h"
 #include "libcamera/internal/log.h"
 
 using namespace libcamera;