Fix early media related issues

* Improve the logic for codec sync: move the native format set out from the condition bridge in case of any early media before bridging during an outgoing call.
* Do a codec sync when receiving early media during 183 progress and 180 ringing.
* Do not sync when the held party left if still on the other conversation.
* Add an extra fix for disabling any tone played during CALLING stage as well.
* Correct the place codec_set for early media, was placed wrong direction before.
* Removed the filter for RINGBACK as well in case of early media.