camera: remove redundant and unnecessary includes

Remove unused or already included headers. Sort and format includes
accordind to the "Google C++ Style Guide". Replace C-headers by C++
analog when it's possible.

Test: build
Change-Id: I19fa6abb5bb68e0257c9c933e68f42f92b394ce7
Signed-off-by: Sergii Piatakov <sergii.piatakov@globallogic.com>
diff --git a/modules/camera/3_4/metadata/metadata.cpp b/modules/camera/3_4/metadata/metadata.cpp
index c5106c7..682d78d 100644
--- a/modules/camera/3_4/metadata/metadata.cpp
+++ b/modules/camera/3_4/metadata/metadata.cpp
@@ -19,11 +19,9 @@
 
 #include "metadata.h"
 
-#include <camera/CameraMetadata.h>
 #include <hardware/camera3.h>
 
-#include "../common.h"
-#include "metadata_common.h"
+#include "common.h"
 
 namespace v4l2_camera_hal {