avcodec/hevc_ps: Expose all SPS and PPS range extension flags

avcodec/hevc_ps: Expose all SPS and PPS range extension flags

We need all the flags to be exposed to be able to pass them on to
HW decoders. I did not attempt to nuance any of the warnings about
flags being unsupported as there's no way, at the point we extract
flags, to say whether an HW decoder is being used.