Add domain_verification_service

For upcoming @SystemApi DomainVerificationManager.

Test: manual, accessing new manager from test app works

Change-Id: Ic73733dce3e9152af9c6f08fb7e460fa5a01ebdf
diff --git a/private/service_contexts b/private/service_contexts
index c90d48e..0d40ced 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -86,6 +86,7 @@
 diskstats                                 u:object_r:diskstats_service:s0
 display                                   u:object_r:display_service:s0
 dnsresolver                               u:object_r:dnsresolver_service:s0
+domain_verification                       u:object_r:domain_verification_service:s0
 color_display                             u:object_r:color_display_service:s0
 netd_listener                             u:object_r:netd_listener_service:s0
 network_watchlist                         u:object_r:network_watchlist_service:s0