CameraClient: Enables meta data notifications

- Adds the needed functionality for enabling/disabling
  metadata messages depending on the camera client
  commands.

Change-Id: Iab597d5519b8fb85ee21c824ec19e9aaec9b5219
diff --git a/services/camera/libcameraservice/api1/CameraClient.cpp b/services/camera/libcameraservice/api1/CameraClient.cpp
index 4491a05..5ab99ba 100644
--- a/services/camera/libcameraservice/api1/CameraClient.cpp
+++ b/services/camera/libcameraservice/api1/CameraClient.cpp
@@ -689,6 +689,10 @@
         enableMsgType(CAMERA_MSG_STATS_DATA);
     } else if (cmd == CAMERA_CMD_HISTOGRAM_OFF) {
         disableMsgType(CAMERA_MSG_STATS_DATA);
+    } else if (cmd == CAMERA_CMD_METADATA_ON) {
+        enableMsgType(CAMERA_MSG_META_DATA);
+    } else if (cmd == CAMERA_CMD_METADATA_OFF) {
+        disableMsgType(CAMERA_MSG_META_DATA);
 #endif
     }