Improve search by adding the settings keywords for supported downloaded services

* Use FeatureFactory to improve the search only for google overlay

Bug: 184171842
Test: atest AccessibilitySettingsTest
Change-Id: I93ed52d2579b7da35dba59f9562b6715d13dd80d

src/com/android/settings/accessibility/AccessibilitySearchFeatureProviderImpl.java

@@ -0,0 +1,34 @@
+/*
+ * 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.settings.accessibility;
+
+import android.content.Context;
+
+import com.android.settingslib.search.SearchIndexableRaw;
+
+import java.util.List;
+
+/**
+ * Provider implementation for Accessibility Search related features.
+ */
+public class AccessibilitySearchFeatureProviderImpl implements AccessibilitySearchFeatureProvider {
+
+    @Override
+    public List<SearchIndexableRaw> getSearchIndexableRawData(Context context) {
+        return null;
+    }
+}