Reset frame udpate flags after qp estimate in tpl
Reset frame udpate flags after qp estimate in tpl

After the frame quantizer estimate run in tpl model, reset the
actual value assigned to the current coding frame. This would
avoid certain frame update flags being overwritten by different
frame types' update.

Change-Id: Idde2ba1108f1f68747b14149b211f882965c99f0

webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx