callwaiting: Support CDMA call waiting

Implement the CDMA call waiting setting menu
considering CDMA VoLTE. (UT and CDMA case)
Menu doesn't show status of call waiting if UT is not supported.
So SwitchPreference is not used.
When set call waiting, if call waiting doesn't work over UT,
dial will be triggered.

Bug: 146531989

Change-Id: I805319d93a732a8f24ac7411493259be3b3d3ee6
Signed-off-by: Jang Hayeong <hayeong.jang@samsung.com>
Signed-off-by: Sungjae <sung_jae.kim@samsung.com>
4 files changed