Revert "Minimum viable TimeZoneDetectorService"

Remove the stubbed TimeZoneDetectorService. Priorities
dictated that it not be worked on so it has never been
used.

This reverts commit 7fb88c39.

Bug: 112827764
Bug: 78217059
Test: build / boot
Change-Id: I39ed2fc7f8de8d4b2c0d883cd264cc126579af27