Commits work in progress on utilizing Android's native hardware (and software) decoding (and encoding) via MediaCodec.

Refactors the way specific Codec instances are accessed in MediaStreamImpl. Passes "format parameters" received via SDP/Jingle to codecs, which can handle them (Opus).

Temporary fix for the issues with a NotRealizedError exception being thrown, and the camera being turned on in audio-only calls.

Adds an Opus configuration form and changes the default Opus settings. Updates the Opus JNI binaries. Notifies encoders that implement PacketLossAwareEncoder (Opus and SILK) of packet loss information received via RTCP.

Moves Constants to the serivce package so that it would be accessible for other packages that need to access a PT name

Implements a mechanism that allows JMF Controls registered in the  codec implementations to be accessed in MediaStream. Adds a FECDecoderControl interface and uses it to collect FEC statistics in MediaStreamStatsImpl. Adds a "Packets decoded with FEC" line in the call info window.

Fixes issues with video conferencing such as a failure of the local video to be displayed and a limitation of the conference focus with respect to requiring it to capture video as well.