[automerger skipped] Merge "Camera: Add new hidden API for camera open/close callback" into qt-qpr1-dev am: ca1872dc0d -s ours

am skip reason: Change-Id I04cae782d96f0e32be8ef588dcd328f84b32887a with SHA-1 e375ee8f8a is in history

Change-Id: I45977bb6d39aa59aaee98feb8a2326a8e798f6f1