Create the main architecture for Settings Dynamic Homepage

Create an architecture for the homepage to enable card adding
and displaying.

Bug: 111676964
Test: robotests
Change-Id: I06efe3d16585060a8e99313586ae29bbde7fe3e8

src/com/android/settings/homepage/HomepageCardController.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2018 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.homepage;
+
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import java.util.List;
+
+//TODO(b/111821137): add test cases
+/**
+ * Data controller for {@link HomepageCard}.
+ */
+public interface HomepageCardController {
+
+    @HomepageCard.CardType
+    int getCardType();
+
+    /**
+     * When data is updated or changed, the new data should be passed to HomepageManager for list
+     * updating.
+     */
+    void onDataUpdated(List<HomepageCard> cardList);
+
+    void onPrimaryClick(HomepageCard card);
+
+    void onActionClick(HomepageCard card);
+
+    void setLifecycle(Lifecycle lifecycle);
+
+    void setHomepageCardUpdateListener(HomepageCardUpdateListener listener);
+}