Initial version of LocationTimeZoneManagerService

This includes an initial version of LocationTimeZoneManagerService,
supporting / implementation classes and test infra.

This commit is not final code (see various TODOs) but forms the
scaffolding for later commits. The ControllerImpl only supports a single
LocationTimeZoneProvider, and the "real" binder implementation is left
for a later commit.

Test: atest services/tests/servicestests/src/com/android/server/location/timezone/
Bug: 149014708
Change-Id: Icfba9a816e55a51ee555e08bb889848644539735