Change name in the rules after renaming dns_listener -> netd_listener

Change-Id: I4737a087f2d00e1028d1cb43d9eda814a008dbe8
diff --git a/service_contexts b/service_contexts
index f7ac035..6111c37 100644
--- a/service_contexts
+++ b/service_contexts
@@ -36,7 +36,7 @@
 diskstats                                 u:object_r:diskstats_service:s0
 display.qservice                          u:object_r:surfaceflinger_service:s0
 display                                   u:object_r:display_service:s0
-dns_listener                              u:object_r:dns_listener_service:s0
+netd_listener                             u:object_r:netd_listener_service:s0
 DockObserver                              u:object_r:DockObserver_service:s0
 dreams                                    u:object_r:dreams_service:s0
 drm.drmManager                            u:object_r:drmserver_service:s0