Added support for CABAC entropy coding.
Added support for B slices.
Fixed an issue in rate control constant QP mode.
Change-Id: Ib759d35e8e943f941aa9b8bbff0362d92c619994
Fixed the following bugs
Issue 21145276
Issue 21144884
Issue 21181133
Issue 21181134
Decoder now returns error if the level in stream is higher than level at init
Change-Id: I8892c62bd98f7854d046510330c05a1e9ca826b2