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
3 files changed