Bitmask: add bitmask tx_size and block_size table
Bitmask: add bitmask tx_size and block_size table

Add look up tables for different tx_size and block_size with
minimum processing unit as 4x4.

Change-Id: I6d37345814067ffdf72126cd67f04c40d0708615

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