Initialize level map prob models in cb4x4
Initialize level map prob models in cb4x4

Change-Id: I5dec82552b41a5523155b2dea9e05ce69fba4917

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