Rename check_best_zero_mv to skip_repeated_mv
Rename check_best_zero_mv to skip_repeated_mv

Change-Id: I0473b10cdbdfea7a492f65e7e02dc1a8bb6a0865

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