Fix search index for a financed device

Now with two preference controllers, one for enterprise device and one
for financed device, the search index issue (querying "Financed device
info" in Settings does not show a search result) is fixed. The financed
preference controller is used when the device is a financed device.
Otherwise, the enterprise preference controller is used.

Bug: 183551684
Test: Used a test device that is registered via ZT
Test: m RunSettingsRoboTests ROBOTEST_FILTER=EnterprisePrivacyPreferenceControllerTest
Test: m RunSettingsRoboTests ROBOTEST_FILTER=FinancedPrivacyPreferenceControllerTest
Test: m RunSettingsRoboTests ROBOTEST_FILTER=PrivacyPreferenceControllerHelperTest

Change-Id: I051144ec9004f86456285078ebb1c72266f80a55

src/com/android/settings/enterprise/FinancedPrivacyPreferenceController.java

@@ -0,0 +1,62 @@
+/*
+ * 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.enterprise;
+
+import android.content.Context;
+
+import androidx.preference.Preference;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+import java.util.Objects;
+
+/** Preference controller which displays a financed preference for financed devices. */
+public class FinancedPrivacyPreferenceController extends AbstractPreferenceController implements
+        PreferenceControllerMixin {
+
+    private static final String PREF_KEY_FINANCED_PRIVACY = "financed_privacy";
+    private final PrivacyPreferenceControllerHelper mPrivacyPreferenceControllerHelper;
+
+    public FinancedPrivacyPreferenceController(Context context) {
+        this(Objects.requireNonNull(context), new PrivacyPreferenceControllerHelper(context));
+    }
+
+    @VisibleForTesting
+    FinancedPrivacyPreferenceController(
+            Context context, PrivacyPreferenceControllerHelper privacyPreferenceControllerHelper) {
+        super(Objects.requireNonNull(context));
+        mPrivacyPreferenceControllerHelper = Objects.requireNonNull(
+                privacyPreferenceControllerHelper);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        mPrivacyPreferenceControllerHelper.updateState(preference);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return mPrivacyPreferenceControllerHelper.isFinancedDevice();
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREF_KEY_FINANCED_PRIVACY;
+    }
+}