cros: Force disable stylus features on pyro

ash/common/system/chromeos/palette/palette_tray.cc

Index: ash/common/system/chromeos/palette/palette_tray.cc
diff --git a/ash/common/system/chromeos/palette/palette_tray.cc b/ash/common/system/chromeos/palette/palette_tray.cc
index 7f66235cfc8801c8bea789b9af2270ebd4228c06..1fdb996b02ee4a7e3666755872ecf04f06e5d895 100644
--- a/ash/common/system/chromeos/palette/palette_tray.cc
+++ b/ash/common/system/chromeos/palette/palette_tray.cc
@@ -283,6 +283,10 @@ void PaletteTray::OnTouchscreenDeviceConfigurationChanged() {
 }
 
 void PaletteTray::OnStylusStateChanged(ui::StylusState stylus_state) {
+  // Device may have a stylus but it has been forcibly disabled.
+  if (!palette_utils::HasStylusInput())
+    return;
+
   PaletteDelegate* palette_delegate = Shell::GetInstance()->palette_delegate();
 
   // Don't do anything if the palette should not be shown or if the user has