Add feature provider for dashboard.

The feature provider contains API that controls whether a new
information architecture should be used. By default it's false.

Bug: 31768091
Test: make RunSettingsRoboTests
Change-Id: I5b177be418def50d877f53dc799e42d06eba95ec

src/com/android/settings/dashboard/DashboardFeatureProvider.java

@@ -0,0 +1,26 @@
+/*
+ * 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.dashboard;
+
+import android.content.Context;
+
+/**
+ * FeatureProvider for dashboard (aka settings homepage).
+ */
+public interface DashboardFeatureProvider {
+
+    boolean shouldUseNewIALayout(Context context);
+}