Add gnss_time_update_service selinux changes.

GnssTimeUpdateService is a new service that is being added to System
Server. It will periodically get and suggest GNSS time for time detection on
Android.

Ignore-AOSP-First: Service relies on location APIs that are only in
internal right now.
Bug: 157265008
Test: Build only

Change-Id: Iedb2783b2f34ac71f665663b9db719e8ed4d35dc
diff --git a/private/service_contexts b/private/service_contexts
index f22e2fd..a38d354 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -105,6 +105,7 @@
 android.hardware.fingerprint.IFingerprintDaemon u:object_r:fingerprintd_service:s0
 game                                      u:object_r:game_service:s0
 gfxinfo                                   u:object_r:gfxinfo_service:s0
+gnss_time_update_service                  u:object_r:gnss_time_update_service:s0
 graphicsstats                             u:object_r:graphicsstats_service:s0
 gpu                                       u:object_r:gpu_service:s0
 hardware                                  u:object_r:hardware_service:s0