Refactor the sub8x8 block motion search control
Refactor the sub8x8 block motion search control

Change-Id: Ia340e66e0a61403070adf8e4f18f00eab143f8f7

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