Migrate from Plugin SearchTarget to API search Target [1/3]

Setup architecture for separation between aosp and quickstep search as setup for switch to android.app.SearchTarget

Bug: 177223401
Test: manual
Change-Id: Iefd069a34d5e5551bf731e9171958e93377774aa

quickstep/src/com/android/launcher3/search/SearchTargetHandler.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2021 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.launcher3.search;
+
+import com.android.systemui.plugins.shared.SearchTarget;
+
+/**
+ * An interface for supporting dynamic search results
+ */
+public interface SearchTargetHandler {
+
+    /**
+     * Update view using values from {@link SearchTarget}
+     */
+    void applySearchTarget(SearchTarget searchTarget);
+
+    /**
+     * Handles selection of SearchTarget
+     */
+    default void handleSelection(int eventType) {
+    }
+
+}