CameraModule: fix getCameraInfo()

Remove mCameraCharacteristicsMap.

CameraModule kept a CameraMetadata in mCameraCharacteristicsMap
and kept its camera_metadata in mCameraInfoMap. When CameraMetadata
gets moved in mCameraCharacteristicsMap, it may clone a new
camera_metadata and free the old one. So the original
camera_metadata stored in mCameraCharacteristicsMap becomes invalid.

Bug: 22171288
Change-Id: Ia8e99fe42989946bc952ad23abb296aeac60da83
diff --git a/services/camera/libcameraservice/common/CameraModule.h b/services/camera/libcameraservice/common/CameraModule.h
index c21092e..36822c7 100644
--- a/services/camera/libcameraservice/common/CameraModule.h
+++ b/services/camera/libcameraservice/common/CameraModule.h
@@ -33,6 +33,7 @@
 class CameraModule {
 public:
     CameraModule(camera_module_t *module);
+    virtual ~CameraModule();
 
     // Must be called after construction
     // Returns OK on success, NO_INIT on failure
@@ -60,7 +61,6 @@
 
     camera_module_t *mModule;
     KeyedVector<int, camera_info> mCameraInfoMap;
-    KeyedVector<int, CameraMetadata> mCameraCharacteristicsMap;
     Mutex mCameraInfoLock;
 };