The object specifies the jitter buffer mode applied to
a call connection.
adaptive - means to use cvapCodecConfigNewJtrNomDelay as
the initial jitter buffers size and let the DSP
pick the optimal value of the jitter buffer
size between the range of
cvapCodecConfigJitterMaxDelay and
cvapCodecConfigJitterMinDelay.
fixed - means to use a constant jitter buffer size
which is specified by cvapCodecConfigNewJtrNomDelay.