vp9 non-rd partition: Update condition on force_split for skin area.
vp9 non-rd partition: Update condition on force_split for skin area.

Avoid low resolutions for now.

Change-Id: Ib3a7bb8716a033449b2afb216edd70897a280df9

luctrudeau/aom,webmproject/libvpx,ittiamvpx/libvpx-1,mbebenita/aom,GrokImageCompression/aom,ShiftMediaProject/libvpx,webmproject/libvpx,mwgoldsmith/vpx,ShiftMediaProject/libvpx,luctrudeau/aom,smarter/aom,mwgoldsmith/vpx,mwgoldsmith/vpx,mwgoldsmith/vpx,webmproject/libvpx,ittiamvpx/libvpx-1,ShiftMediaProject/libvpx,ittiamvpx/libvpx-1,mwgoldsmith/libvpx,mwgoldsmith/libvpx,Topopiccione/libvpx,ittiamvpx/libvpx-1,mbebenita/aom,webmproject/libvpx,Topopiccione/libvpx,Topopiccione/libvpx,ShiftMediaProject/libvpx,smarter/aom,Topopiccione/libvpx,mwgoldsmith/vpx,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,mwgoldsmith/vpx,smarter/aom,Topopiccione/libvpx,mbebenita/aom,mwgoldsmith/libvpx,luctrudeau/aom,mbebenita/aom,mbebenita/aom,GrokImageCompression/aom,webmproject/libvpx,webmproject/libvpx,Topopiccione/libvpx,mwgoldsmith/libvpx,GrokImageCompression/aom,smarter/aom,smarter/aom,mwgoldsmith/libvpx,ittiamvpx/libvpx-1,ShiftMediaProject/libvpx,luctrudeau/aom,GrokImageCompression/aom,GrokImageCompression/aom,smarter/aom,ittiamvpx/libvpx-1,mbebenita/aom,mwgoldsmith/libvpx,mbebenita/aom,luctrudeau/aom,mbebenita/aom