sepolicy: Adding policy for objectTracker.

This feature is provided by SCVE team to support Camera APK team. It is used for tracking the moving objects in the preview frames. We implemented HIDL for objectTracker to support system access.

Acked-by: suchawla <suchawla@qti.qualcomm.com>

Change-Id: I397bf8798af242423f00445202b027fe5fbdcc23