galaxys2-common: fix front cam video recording

https://jira.cyanogenmod.org/browse/CYAN-4035

Change-Id: Ia9a5845e10d9e9f5b5e868fa6cbc8e173b0a7d9c
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
media_codecs: Don't try to use absent VP8 decoder

Change-Id: Iff6813a4a29d36e16564e608010520520d60d7fa