Enable cb4x4 by default
Enable cb4x4 by default

Change-Id: Icda2f6bae803fe73090261c81ac9a0f65d55d8f8

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