Use aom_writer with od_encode_cdf_adapt().

Change the od_encode_cdf_adapt() function to take an aom_writer
 struct instead of an od_ec_enc struct.
Rename od_encode_cdf_adapt() to aom_encode_cdf_adapt().

Change-Id: I00de05b8b7428f67139c234160ab9aaf8900f967
5 files changed