Sub-functions in MASA/OMASA path

[x] compensate_energy_ratios, combine_freqbands_and_subframes, encode_lfe_to_total_energy_ratio
[x] ivas_qmetadata_enc_encode_hr_384_512 and sub-functions
[x] ivas omasa energy and ratio est, merge masa metadata
[x] Q-info documentation in decoder files - comments