Fix sepolicy get_prop for SF namespace.

Bug: 190769260
Test: make.
Change-Id: I5d86beaa392b009d0aae37c7a3dd7f90e7cf5f70
diff --git a/private/surfaceflinger.te b/private/surfaceflinger.te
index f99ce96..9900600 100644
--- a/private/surfaceflinger.te
+++ b/private/surfaceflinger.te
@@ -61,7 +61,7 @@
 
 # Get properties.
 get_prop(surfaceflinger, qemu_sf_lcd_density_prop)
-get_prop(network_stack, device_config_surface_flinger_native_boot_prop)
+get_prop(surfaceflinger, device_config_surface_flinger_native_boot_prop)
 
 # Use open files supplied by an app.
 allow surfaceflinger appdomain:fd use;