[Audio Routing] Add audio routing functionality for hearing device

* 'Ringtone', 'Call', 'Media', 'System sounds' routing capability for hearing device

Bug: 269122580
Test: make RunSettingsRoboTests ROBOTEST_FILTER=HearingDeviceAudioRoutingBasePreferenceControllerTest
Change-Id: Id43b2323740bfa40c36f74dec644c00695f414c3

src/com/android/settings/bluetooth/HearingDeviceRingtoneRoutingPreferenceController.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2023 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 com.android.settings.bluetooth;
+
+import android.content.Context;
+import android.media.AudioAttributes;
+import android.provider.Settings;
+
+import com.android.settingslib.bluetooth.CachedBluetoothDevice;
+
+/**
+ * The controller of the hearing device ringtone routing list preference.
+ */
+public class HearingDeviceRingtoneRoutingPreferenceController extends
+        HearingDeviceAudioRoutingBasePreferenceController {
+
+    private CachedBluetoothDevice mHearingDevice;
+
+    public HearingDeviceRingtoneRoutingPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    /**
+     * Initializes objects in this controller. Need to call this before using the controller.
+     *
+     * @param cachedBluetoothDevice the hearing device to configure audio routing
+     */
+    public void init(CachedBluetoothDevice cachedBluetoothDevice) {
+        mHearingDevice = cachedBluetoothDevice;
+    }
+
+    @Override
+    protected int[] getSupportedAttributeList() {
+        return new int[] {AudioAttributes.USAGE_NOTIFICATION_RINGTONE};
+    }
+
+    @Override
+    protected CachedBluetoothDevice getHearingDevice() {
+        return mHearingDevice;
+    }
+
+    @Override
+    protected void saveRoutingValue(Context context, int routingValue) {
+        Settings.Secure.putInt(context.getContentResolver(),
+                Settings.Secure.HEARING_AID_RINGTONE_ROUTING, routingValue);
+    }
+
+    @Override
+    protected int restoreRoutingValue(Context context) {
+        return Settings.Secure.getInt(context.getContentResolver(),
+                Settings.Secure.HEARING_AID_RINGTONE_ROUTING, RoutingValue.AUTO);
+    }
+}