add support for flv

Change-Id: I484b1f9ba0ab868eb13d413095d80d021447050f
add ffmpeg heuristic decoder
you need to sync git "https://github.com/omxcodec/android_frameworks_native" branch:cm_maguro-10.1

Change-Id: Ie9cc7c9665f4a25614f3785e80e5813f88b1c892