Update "Open networks available" toggle to instead open notification channel preferences.

Bug: 36526438
Test: make ROBOTEST_FILTER=NotifyOpenNetworkPreferenceControllerTest RunSettingsRoboTests -j40
Change-Id: Idde3949856d050e62abff2c75a7b7db475a94d99

src/com/android/settings/utils/NotificationChannelHelper.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2017 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.utils;
+
+import android.app.INotificationManager;
+import android.app.NotificationChannel;
+import android.os.RemoteException;
+
+/**
+ * Wrappers around methods in {@link INotificationManager} and {@link NotificationChannel} to
+ * facilitate unit testing.
+ *
+ * TODO: delete this class once robolectric supports Android O
+ */
+public class NotificationChannelHelper {
+    private INotificationManager mNotificationManager;
+
+    public NotificationChannelHelper(
+            INotificationManager notificationManager) {
+        mNotificationManager = notificationManager;
+    }
+
+    /**
+     * Returns the notification channel settings for a app given its package name, user id, and
+     * channel id.
+     */
+    public NotificationChannelWrapper getNotificationChannelForPackage(String pkg, int uid,
+            String channelId, boolean includeDeleted) throws RemoteException {
+        NotificationChannel channel = mNotificationManager.getNotificationChannelForPackage(
+                pkg, uid, channelId, includeDeleted);
+        return channel == null ? null : new NotificationChannelWrapper(channel);
+    }
+
+    /**
+     * Wrapper around {@link NotificationChannel} to facilitate unit testing.
+     *
+     * TODO: delete this class once robolectric supports Android O
+     */
+    public class NotificationChannelWrapper {
+        private NotificationChannel mChannel;
+
+        public NotificationChannelWrapper(NotificationChannel channel) {
+            mChannel = channel;
+        }
+
+        public int getImportance() {
+            return mChannel.getImportance();
+        }
+    }
+}