FP5: Set debug.sf.auto_latch_unsignaled to 0

Need to explicitly set auto_latch_unsignaled property to
disabled state to keep latch-unsignaled as the default
behavior.

Change-Id: I3856caaf0a68e7e720819f25338d1eb9196f56b0
diff --git a/vendor.prop b/vendor.prop
index 337f9e2..45aaef1 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -125,6 +125,7 @@
 vendor.gatekeeper.disable_spu=true
 
 # Graphics
+debug.sf.auto_latch_unsignaled=0
 debug.sf.disable_client_composition_cache=1
 debug.sf.enable_gl_backpressure=1
 debug.sf.high_fps_early_gl_phase_offset_ns=-4000000