Architecture review of Copyable Slice

Design doc: https://drive.google.com/open?id=1NJPd_282H4195HUGJH5cGJO_Jrcz1Vl6AAw_VQOtGq0

Fixes: 	118398321
Test: manual
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.slice

Change-Id: Ic6762e58698a994d16a5de1778b4035ae430a256

tests/robotests/src/com/android/settings/testutils/FakeCopyableController.java

@@ -0,0 +1,44 @@
+/*
+ * 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.testutils;
+
+import android.content.Context;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.slices.CopyableSlice;
+
+public class FakeCopyableController extends BasePreferenceController implements
+        CopyableSlice {
+
+    public FakeCopyableController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+
+    @Override
+    public boolean isSliceable() {
+        return true;
+    }
+
+    @Override
+    public void copy() {
+    }
+}