libhardware: Add camera_info typedef

Change-Id: I67ce80c886723d4dba7f799b6b135aa7026c2187
diff --git a/include/hardware/camera_common.h b/include/hardware/camera_common.h
index a7cf1c2..22b3f7a 100644
--- a/include/hardware/camera_common.h
+++ b/include/hardware/camera_common.h
@@ -100,7 +100,7 @@
  */
 typedef struct camera_metadata camera_metadata_t;
 
-struct camera_info {
+typedef struct camera_info {
     /**
      * The direction that the camera faces to. It should be CAMERA_FACING_BACK
      * or CAMERA_FACING_FRONT.
@@ -165,7 +165,7 @@
      *
      */
     const camera_metadata_t *static_camera_characteristics;
-};
+} camera_info_t;
 
 /**
  * camera_device_status_t: