This CL removes dependency from Piex for a DNG Test file currently in ExifInterfaceTest.java. Specific functions include identifying and setting the byte order of the data, parsing and saving Exif tags, and retrieving thumbnail image data and information. The marker HANDLE_RAW will determine whether to use Piex or not. Bug: 29409358 Change-Id: I4cd9916ac0c6f294fc44d8b76f52d456aeee8cdc