Revert "Camera2: Make static_camera_characteristics const."

Needs a third change that's not yet done with review.

This reverts commit c9ec8a656b59912f496880d3a63c0decd490f09d

Change-Id: Ic3e465e1308cbf107a250ec17b73a59a35e52f9f
diff --git a/include/hardware/camera_common.h b/include/hardware/camera_common.h
index 5697bda..5459b6c 100644
--- a/include/hardware/camera_common.h
+++ b/include/hardware/camera_common.h
@@ -135,9 +135,7 @@
 
     /**
      * The camera's fixed characteristics, which include all camera metadata in
-     * the android.*.info.* sections. This should be a sorted metadata buffer,
-     * and may not be modified or freed by the caller. The pointer should remain
-     * valid for the lifetime of the camera module.
+     * the android.*.info.* sections.
      *
      * Version information (based on camera_module_t.common.module_api_version):
      *
@@ -152,7 +150,7 @@
      *    otherwise.
      *
      */
-    const camera_metadata_t *static_camera_characteristics;
+    camera_metadata_t *static_camera_characteristics;
 };
 
 typedef struct camera_module {