kitakami-common: Set the 'latch_unsignaled' property

Without this change we sometimes skip the execution of SurfaceFlinger
for one frame, which increases latency and often leads to jank.

This is one of several jank improvements suggested by Qualcomm.

Bug: 68943050
Change-Id: I3db1519f8cab496454d900b18f0fa1629c33605c
Signed-off-by: Harshit Jain <harshitjain6751@gmail.com>
Signed-off-by: AmolAmrit <amol.amrit03@outlook.com>

system.prop

@@ -43,6 +43,7 @@ persist.mdpcomp_perfhint=50
 debug.mdpcomp.logs=0
 persist.metadata_dynfps.disable=true
 persist.hwc.ptor.enable=true
+debug.sf.latch_unsignaled=1
 dev.pm.dyn_samplingrate=1
 persist.demo.hdmirotationlock=false
 ro.qualcomm.cabl=2