Move all contextual card related classes.

... from homepage to contextualcards.

Test: rebuild
Change-Id: Id7889566ce1e7257eb699d963ae996906fdb58ff

src/com/android/settings/homepage/contextualcards/slices/SliceContextualCardController.java

@@ -0,0 +1,47 @@
+/*
+ * 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.contextualcards.slices;
+
+import com.android.settings.homepage.contextualcards.ContextualCard;
+import com.android.settings.homepage.contextualcards.ContextualCardController;
+import com.android.settings.homepage.contextualcards.ContextualCardUpdateListener;
+
+/**
+ * Card controller for {@link ContextualCard} built as slices.
+ */
+public class SliceContextualCardController implements ContextualCardController {
+
+    @Override
+    public int getCardType() {
+        return ContextualCard.CardType.SLICE;
+    }
+
+    @Override
+    public void onPrimaryClick(ContextualCard card) {
+
+    }
+
+    @Override
+    public void onActionClick(ContextualCard card) {
+
+    }
+
+    @Override
+    public void setCardUpdateListener(ContextualCardUpdateListener listener) {
+
+    }
+}