libstagefright: Fix DP Parsing issue with mpeg4 SP,ASP

- DP partition logic returns true for mpeg4 clips with SP ,ASP
  profiles.
- Fix the issue by parsing additional fields in the ESDS atom

CRs-fixed: 556619

Change-Id: I69c719011e1a0d2a0b0ae5a9b504b7cce443866b