Change parameters for VP9 dynamic resizing.
Change parameters for VP9 dynamic resizing.

Use a smaller window in dynamic resizing and wait a shorter
time after key frame.

Change-Id: I086f840cdec3c6bdaa9acfe11346d919e445973d

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