Coding path sync test: fix picture comparison
Coding path sync test: fix picture comparison

Change-Id: Iee4957038d61c14cf8fa3f9c094b579c82c20603

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