Refactor SoundSettings to use more preference controller.

- second round of refactoring SoundSettings to use preference
  controller.
- add controller for Emergency broadcast, Vibrate when ring, Phone
  ringtone, Alarm ringtone, and Notification ringtone.

Bug: 32276590
Test: make RunSettingsRoboTests
Change-Id: Iaff48ecb27bf156a5c8995de20ce7a440b094cdb

src/com/android/settings/notification/PhoneRingtonePreferenceController.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2016 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.notification;
+
+import android.content.Context;
+import android.media.RingtoneManager;
+import com.android.settings.Utils;
+
+public class PhoneRingtonePreferenceController extends RingtonePreferenceControllerBase {
+
+    private static final String KEY_PHONE_RINGTONE = "ringtone";
+
+    public PhoneRingtonePreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_PHONE_RINGTONE;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return Utils.isVoiceCapable(mContext);
+    }
+
+    @Override
+    public int getRingtoneType() {
+        return RingtoneManager.TYPE_RINGTONE;
+    }
+}