sm8350-common: props: Disable Skia tracing by default

If the prop "debug.hwui.skia_atrace_enabled" is enabled, too many
skia tracing calls will be printed in every frame. This has obvious
overhead on performance/power, and can cause many janks. So disable
it by default, and user can set it manually if necessary.

system.prop

@@ -4,6 +4,9 @@ vendor.bluetooth.soc=hastings
 # CNE
 persist.vendor.cne.feature=1
 
+# Disable Skia tracing by default
+debug.hwui.skia_atrace_enabled=false
+
 # Graphics
 debug.sf.disable_backpressure=1
 debug.sf.enable_hwc_vds=1