Bug 1071009 - [Loop] Expose bitrate, frames dropped and frame delay to a...

...pplications via TB library.
Added all information given by tokbox including framerate on encoder/decoder side, frames dropped and bitrate. RTP information also available.
Tokbox doesn't provide framedelay information. That info must be retrieved from gecko.
This if is redundant. Every case that's not contemplated by the previous if should enter the else. So...
} else {