Add default CDF table for dual filter.
Add default CDF table for dual filter.

This fixes errors with EC_ADAPT where the CDF tables
are not built from 8-bit probabilities.

Change-Id: I2a35eef3d37503a8011db4089e11ba4da14bbf34

GrokImageCompression/aom,smarter/aom,GrokImageCompression/aom,smarter/aom,GrokImageCompression/aom,smarter/aom,smarter/aom,GrokImageCompression/aom,GrokImageCompression/aom,smarter/aom,smarter/aom,GrokImageCompression/aom