stagefright/extrators: Dolby Vision mp4 extractor update

Add support for 'DvcC' 'DvvC' 'DvwC' boxes.

Change the use of 'csd-2' that was only used by the extractor internally
to instead add that information to 'csd-0';

Change-Id: I5c1378f69e71e8a82f874dc2f961e7384e060e8d