Revert "Make voicemail notification dismissable"

Voicemail notification is required to be a non-dismissable alert for some carriers.

This reverts commit 44be27432a984f9072150c9525477e54cbfe96fd

Bug: 7888110
Change-Id: Iaf6523cff53850422ab06c2c80cc30c6b2987499
diff --git a/src/com/android/phone/ClearMWIService.java b/src/com/android/phone/ClearMWIService.java
deleted file mode 100644
index f718b69..0000000
--- a/src/com/android/phone/ClearMWIService.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2013 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.phone;
-
-import android.app.IntentService;
-import android.content.Intent;
-
-/**
- * Handles the intent to clear the voicemails that is triggered when a notification is dismissed.
- */
-public class ClearMWIService extends IntentService {
-    /** This action is used to clear voicemails. */
-    public static final String ACTION_CLEAR_VOICEMAILS =
-            "com.android.phone.intent.CLEAR_VOICEMAILS";
-
-    private PhoneGlobals mApp;
-
-    public ClearMWIService() {
-        super(ClearMWIService.class.getSimpleName());
-    }
-
-    @Override
-    public void onCreate() {
-        super.onCreate();
-        mApp = PhoneGlobals.getInstance();
-    }
-
-    @Override
-    protected void onHandleIntent(Intent intent) {
-        if (ACTION_CLEAR_VOICEMAILS.equals(intent.getAction())) {
-            mApp.notificationMgr.cancelMWINotification();
-        }
-    }
-}
diff --git a/src/com/android/phone/NotificationMgr.java b/src/com/android/phone/NotificationMgr.java
index 7a3ae0e..42dcdb6 100644
--- a/src/com/android/phone/NotificationMgr.java
+++ b/src/com/android/phone/NotificationMgr.java
@@ -1274,9 +1274,7 @@
                     .setContentTitle(notificationTitle)
                     .setContentText(notificationText)
                     .setContentIntent(pendingIntent)
-                    .setSound(ringtoneUri)
-                    .setAutoCancel(true)
-                    .setDeleteIntent(createClearMWIIntent());
+                    .setSound(ringtoneUri);
             Notification notification = builder.getNotification();
 
             CallFeaturesSetting.migrateVoicemailVibrationSettingsIfNeeded(prefs);
@@ -1285,6 +1283,7 @@
             if (vibrate) {
                 notification.defaults |= Notification.DEFAULT_VIBRATE;
             }
+            notification.flags |= Notification.FLAG_NO_CLEAR;
             configureLedNotification(notification);
             mNotificationManager.notify(VOICEMAIL_NOTIFICATION, notification);
         } else {
@@ -1292,16 +1291,6 @@
         }
     }
 
-    private PendingIntent createClearMWIIntent() {
-        Intent intent = new Intent(mContext, ClearMWIService.class);
-        intent.setAction(ClearMWIService.ACTION_CLEAR_VOICEMAILS);
-        return PendingIntent.getService(mContext, 0, intent, 0);
-    }
-
-    void cancelMWINotification() {
-        updateMwi(false);
-    }
-
     /**
      * Updates the message call forwarding indicator notification.
      *