Camera: Move CameraMetadata.h from service to client library

Change-Id: I940ce86f318f37ae5b73f912a6e589415150125f
diff --git a/services/camera/libcameraservice/Camera2Device.cpp b/services/camera/libcameraservice/Camera2Device.cpp
index 5bfa085..921c8fc 100644
--- a/services/camera/libcameraservice/Camera2Device.cpp
+++ b/services/camera/libcameraservice/Camera2Device.cpp
@@ -202,7 +202,7 @@
     return res;
 }
 
-const camera2::CameraMetadata& Camera2Device::info() const {
+const CameraMetadata& Camera2Device::info() const {
     ALOGVV("%s: E", __FUNCTION__);
 
     return mDeviceInfo;