Fix capture issue of to capture sub-scene.

Fix capture issue of to capture sub-scene.

 - new camera that generated inside Capture has size of Scene and default position.
 - but, if a source is not a rootLayer, the position and size are needed to be set with that of the source.
 - in this patch, we get position input. the position is top-left position of area to be captured in window space.
 - camera actor has position and size those get by input position and size
 - create new method to set jpeg quality to remove it from the argument of Start method

Change-Id: Ie5232e0ef61f34fae101fee5243a39abb29242b5
Signed-off-by: seungho <seungho@seungho.tn.corp.samsungelectronics.net>