Refactor:Merge inverse_transform_block_inter/intra
Refactor:Merge inverse_transform_block_inter/intra

Merge inverse_transform_block_inter inverse_transform_block_intra
to inverse_transform_block

Change-Id: I0f561830e639e3bf8d831c28a7c784cb0c4c8b09

mbebenita/aom,mbebenita/aom,mbebenita/aom,GrokImageCompression/aom,mbebenita/aom,luctrudeau/aom,luctrudeau/aom,luctrudeau/aom,GrokImageCompression/aom,luctrudeau/aom,mbebenita/aom,smarter/aom,smarter/aom,smarter/aom,smarter/aom,mbebenita/aom,GrokImageCompression/aom,mbebenita/aom,mbebenita/aom,GrokImageCompression/aom,luctrudeau/aom,GrokImageCompression/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom,smarter/aom,luctrudeau/aom