VT: SFR: H264: CVO implementation for Tx side.

CVO(Coordination of Video Orientation) implemented for H264.

Support Coordination of Video Orientation (CVO) feature that carried in RTP Header extension.
it updates a device degrees(orientation) on RTP extension when device is rotated.
(6.2.3 of 3GPP Release 12 TS 26.114)

- rtp-param-ext-cvo-degrees: updates how much degress should be rotated.
- rtp-param-ext-cvo-extmap: updates what extmap CVO mapped in SDP negoration.

Bug: 121230209
Change-Id: I49ab063d549b033aef06eadf39fd189384a5f724
Signed-off-by: Byeongjo Park <bjo.park@samsung.com>
Signed-off-by: Kim Sungyeon <sy85.kim@samsung.com>