Enable use of FFMPEG codecs for extended formats

credits to CyanogenMods other device maintainers (saw it on hammerhead)
this fixes m4a playback on Google Play Music for example.

Signed off by Myself5, Carbon Rom i9100 Device Maintainer

Thanks to Scott B for guiding me to this fix.

Change-Id: If457524ab66de2c7e2c6f9de43345111ee08b3b8