JVET-AE0101: implement phase indication SEI message

Tomohiro Ikairequested to merge
ikai/HM:JVET-AE0101_phase_indication_SEI into master

JVET-AE0101: implement phase indication SEI message

Note: the other part (NNPF part, i.e. NNPFC and NNPFA) will be implemented separately.

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