s2vep: add ffmpeg codecs

Change-Id: Ifb9deacc02da25027c4dc3f586830bf2e2649095
s2vep: advertise bluetooth LE capabilities
s2vep: set ro.telephony.call_ring=0
This allows UNSOL_CALL_RING to be faked by the upper layers at
appropriate times. Requires an additional patch.

https://gist.github.com/pawitp/0f400e7b5cfb9bc70c25