MPEG4Extractor: support MPEG-H 3D Audio (2/2)

MPEG-H 3D Audio is a new spatial sound codec, standardized in
ISO/IEC 23008-3. Add support for demuxing MPEG-H 3D Audio format
in MPEG4Extractor so that vendors can integrate MPEG-H decoder
with Codec2.0 interface.

- Add parsing logic of MPEG-H 3D Audio files.
- Make sync sample to be recognized for MPEG-H 3D Audio data to
  seek properly.

Bug: 185100731
Test: atest MediaExtractorTest#testMpegh3dAudioMediaExtractorMha1
Test: atest MediaExtractorTest#testMpegh3dAudioMediaExtractorMhm1
Change-Id: I9c1dc6f9ffd008392a8960896a58eb94cc55c530