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/RingtonePreferenceControllerBase.java

@@ -0,0 +1,55 @@
+/*
+ * 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.Ringtone;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.core.PreferenceController;
+
+public abstract class RingtonePreferenceControllerBase extends PreferenceController {
+
+    public RingtonePreferenceControllerBase(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        Uri ringtoneUri = RingtoneManager.getActualDefaultRingtoneUri(mContext, getRingtoneType());
+        final CharSequence summary = Ringtone.getTitle(
+            mContext, ringtoneUri, false /* followSettingsUri */, true /* allowRemote */);
+        if (summary != null) {
+            preference.setSummary(summary);
+        }
+    }
+
+    public abstract int getRingtoneType();
+
+}