Minimum viable TimeZoneDetectorService

This is a do-nothing TimeZoneDetectorService that can be
populated in following commits. A temporary method has been
added so the service has one method.

Unit tests can be run with:

atest FrameworksServicesTests:TimeZoneDetectorServiceTest

Test: build / boot
Test: See above
Change-Id: I565fb5dd2f18b7aac2e5779d346bfe69e9da02af
diff --git a/Android.bp b/Android.bp
index 4d2e5e1..6bf8e26 100644
--- a/Android.bp
+++ b/Android.bp
@@ -104,6 +104,7 @@
         "core/java/android/app/timedetector/ITimeDetectorService.aidl",
         "core/java/android/app/timezone/ICallback.aidl",
         "core/java/android/app/timezone/IRulesManager.aidl",
+        "core/java/android/app/timezonedetector/ITimeZoneDetectorService.aidl",
         "core/java/android/app/usage/ICacheQuotaService.aidl",
         "core/java/android/app/usage/IStorageStatsManager.aidl",
         "core/java/android/app/usage/IUsageStatsManager.aidl",