[Android] Adding scheduling through GcmNetworkManager

components/background_task_scheduler/android/junit/src/org/chromium/components/background_task_scheduler/TestBackgroundTask.java

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.components.background_task_scheduler;
+
+import android.content.Context;
+
+/** Dummy implementation of a background task used for testing. */
+class TestBackgroundTask implements BackgroundTask {
+    public TestBackgroundTask() {}
+
+    @Override
+    public boolean onStartTask(
+            Context context, TaskParameters taskParameters, TaskFinishedCallback callback) {
+        return false;
+    }
+
+    @Override
+    public boolean onStopTask(Context context, TaskParameters taskParameters) {
+        return false;
+    }
+}