Add new_quant quantization in rdopt for 4x4 blocks and intra
Add new_quant quantization in rdopt for 4x4 blocks and intra

Originally the uniform quantization function was not being
replaced with the new_quant version in rdopt when new_quant
is turned on. This fixes the bug.

Change-Id: I593793bb909e1e1a6f89544eeca6783fe0576f25

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