Update MetricsTimeZoneDetectorStateTest

Update MetricsTimeZoneDetectorStateTest for telephony fallback. The test
was added in parallel to the feature work.

Bug: 197624972
Bug: 200279201
Test: atest services/tests/servicestests/src/com/android/server/timezonedetector/
Change-Id: I433940676f90c69f25064ce03d37e9f93503e5ec
1 file changed