OfflineLocationTimeZoneProvider config in system

This configures the Offline LocationTimeZone provider in the system
server. The code originates from the com.android.geotz apex.

Bug: 172546738
Test: build / boot with feature disabled and enabled
Test: When enabled: adb shell dumpsys activity service android/com.android.timezone.geotz.provider.OfflineLocationTimeZoneService
Test: When enabled: adb shell dumpsys location_time_zone_manager
Change-Id: Idee16d11b5d2c25d1d6e2c7a755c05d10dbf7d3d