VT: SFR: added parameters to handle RTP IP Addresses through setParameters().

Added following parameters to set ip addresses for RTP scenarios.

- rtp-param-local-ip:
  rtp-param-local-port: local ip/port to be bound a socket as per SDP negotation.

- rtp-param-remote-ip:
  rtp-param-remote-port: remote ip/port pair where to send RTP packets.

Merged-In: I8b6d8492c1a6e5eeba88d4829e4815227f083edb
Change-Id: I8b6d8492c1a6e5eeba88d4829e4815227f083edb
Signed-off-by: Byeongjo Park <bjo.park@samsung.com>
Signed-off-by: Kim Sungyeon <sy85.kim@samsung.com>