RDKTV-23013: Hisense v2 SetPlayback rate failing to play at 2X speed

Reason for change: disable instant rate change in cobalt.
Test Procedure: refer ticket.
Risks: None
Priority: P1
Signed-off-by: sramul630 <sunil_ramulu@comcast.com>

Change-Id: Icae7b8014600d2791f4cc01f7e306f48014723b9