last exo player commit:
f72ca833

change ExoPlayerImpl.java
change Player.java
add VideoListener.java
    add support VideoListener


custom AspectRatioFrameLayout.java


change MediaCodecVideoRenderer.java
add SurfaceNotValidException.java
    add hack with SurfaceNotValidException


change MP4Extractor.java 
    MAXIMUM_READ_AHEAD_BYTES_STREAM to 1MB
