VP9_resizing: adjust the threshold and another improvement.
VP9_resizing: adjust the threshold and another improvement.

Adjust the qp threshold based on the denoising setting; not allow
to scale directly from original resolution to one half and vise versa.

Change-Id: I032a9b22f8e1c88de6bb81cf8351367223a3e40d

shacklettbp/aom,webmproject/libvpx,luctrudeau/aom,thdav/aom,openpeer/libvpx_new,mwgoldsmith/libvpx,jmvalin/aom,openpeer/libvpx_new,smarter/aom,luctrudeau/aom,luctrudeau/aom,thdav/aom,mwgoldsmith/vpx,GrokImageCompression/aom,Topopiccione/libvpx,webmproject/libvpx,mwgoldsmith/libvpx,jmvalin/aom,openpeer/libvpx_new,openpeer/libvpx_new,smarter/aom,GrokImageCompression/aom,mwgoldsmith/vpx,ittiamvpx/libvpx-1,mwgoldsmith/vpx,smarter/aom,ShiftMediaProject/libvpx,mbebenita/aom,Topopiccione/libvpx,mbebenita/aom,openpeer/libvpx_new,webmproject/libvpx,mbebenita/aom,luctrudeau/aom,jmvalin/aom,ShiftMediaProject/libvpx,shacklettbp/aom,mwgoldsmith/vpx,mbebenita/aom,ShiftMediaProject/libvpx,openpeer/libvpx_new,shacklettbp/aom,mbebenita/aom,smarter/aom,mwgoldsmith/libvpx,GrokImageCompression/aom,jmvalin/aom,mbebenita/aom,smarter/aom,jmvalin/aom,Topopiccione/libvpx,ittiamvpx/libvpx-1,shacklettbp/aom,webmproject/libvpx,ittiamvpx/libvpx-1,jmvalin/aom,Topopiccione/libvpx,mwgoldsmith/libvpx,thdav/aom,smarter/aom,GrokImageCompression/aom,shacklettbp/aom,ittiamvpx/libvpx-1,luctrudeau/aom,thdav/aom,mwgoldsmith/libvpx,ShiftMediaProject/libvpx,thdav/aom,webmproject/libvpx,mwgoldsmith/vpx,Topopiccione/libvpx,mbebenita/aom,mbebenita/aom,thdav/aom,shacklettbp/aom,luctrudeau/aom,mwgoldsmith/libvpx,GrokImageCompression/aom,mwgoldsmith/vpx,ShiftMediaProject/libvpx,webmproject/libvpx,Topopiccione/libvpx,ittiamvpx/libvpx-1,GrokImageCompression/aom,ittiamvpx/libvpx-1,mbebenita/aom