Add detect_flash_from_frame_stats()
Add detect_flash_from_frame_stats()

Change-Id: I06a64b45045334cf9563d27e154a3b8095ad80a3

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