Fixed incorrect accounting of various VLC coded syntax elements as EP coded bins in CABAC stats

Various VLC coded syntax elements (NAL unit header, trailing bits, byte alignment bits, startcode emulation prevention byte bits) are incorrectly accounted as EP coded bins in the CABAC stats. With this fix, the difference between number of EP bins and EP bits reported in the CABAC stats corresponds to VLC coded bits. Additionally corrected mismatch in position of BITS__LFNST CodingStatisticsType and statNames enumerated data types.