A simple API for the AOSP LocationTimeZoneProvider

A basic time zone geolocation API.

If the provider deployment is left to the partners, this could be made
the module API as it encapsulates the S2 storage code / file behind a
simple, implementation independent API.

Bug: 152746105
Test: atest GeotzLookupTests
Change-Id: Id65db0390bbc15c1924f245442774b6c67f05582
10 files changed