Implementation of time user configuration update

This adds support for updating user-facing time detector configuration
via the TimeDetectorService.

Bug: 172891783
Bug: 229740080
Test: atest com.android.server.timedetector android.app.time
Change-Id: I109e59e44dbe085d456fc36bcd98375d118940c0

core/java/android/app/time/ITimeDetectorListener.aidl

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.app.time;
+
+/** {@hide} */
+oneway interface ITimeDetectorListener {
+    void onChange();
+}

core/java/android/app/timedetector/ITimeDetectorService.aidl

@@ -17,6 +17,7 @@
 package android.app.timedetector;
 
 import android.app.time.ExternalTimeSuggestion;
+import android.app.time.ITimeDetectorListener;
 import android.app.time.TimeCapabilitiesAndConfig;
 import android.app.time.TimeConfiguration;
 import android.app.timedetector.GnssTimeSuggestion;
@@ -39,6 +40,9 @@ import android.app.timedetector.TelephonyTimeSuggestion;
  */
 interface ITimeDetectorService {
   TimeCapabilitiesAndConfig getCapabilitiesAndConfig();
+  void addListener(ITimeDetectorListener listener);
+  void removeListener(ITimeDetectorListener listener);
+
   boolean updateConfiguration(in TimeConfiguration timeConfiguration);
 
   void suggestExternalTime( in ExternalTimeSuggestion timeSuggestion);