Add developer option for device identifier restrictions

Bug: 123646983
Test: Manually verified device_config switch was toggled via
      the new developer option.

Change-Id: I6a4e2d1f7bfdaae402e594e7ebc1b845bf12996e

res/values/strings.xml

@@ -5830,6 +5830,10 @@
     <string name="sms_access_restriction_enabled">Restrict SMS &amp; call log access</string>
     <!-- Summary for whether to enable SMS access restriction [CHAR LIMIT=NONE]-->
     <string name="sms_access_restriction_enabled_summary">Only default phone and messaging apps have SMS &amp; call log permissions</string>
+    <!-- Title for the new device identifier access restrictions [CHAR LIMIT=50]-->
+    <string name="device_identifier_access_restrictions_title">Enable device identifier restrictions</string>
+    <!-- Summary for the new device identifier access restrictions [CHAR LIMIT=NONE]-->
+    <string name="device_identifier_access_restrictions_summary">Enable the new access restrictions for device identifiers.</string>
 
 
     <!-- Message when there are no available trust agents to display -->

res/xml/development_settings.xml

@@ -534,6 +534,11 @@
             android:key="sms_access_restriction_enabled"
             android:title="@string/sms_access_restriction_enabled"
             android:summary="@string/sms_access_restriction_enabled_summary" />
+
+        <SwitchPreference
+            android:key="device_identifier_access_restrictions"
+            android:title="@string/device_identifier_access_restrictions_title"
+            android:summary="@string/device_identifier_access_restrictions_summary" />
     </PreferenceCategory>
 
     <com.android.settings.development.autofill.AutofillPreferenceCategory

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -479,6 +479,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new FreeformWindowsPreferenceController(context));
         controllers.add(new DesktopModePreferenceController(context));
         controllers.add(new SmsAccessRestrictionPreferenceController(context));
+        controllers.add(new DeviceIdentifierAccessRestrictionsPreferenceController(context));
         controllers.add(new ShortcutManagerThrottlingPreferenceController(context));
         controllers.add(new EnableGnssRawMeasFullTrackingPreferenceController(context));
         controllers.add(new DefaultLaunchPreferenceController(context, "running_apps"));

src/com/android/settings/development/DeviceIdentifierAccessRestrictionsPreferenceController.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2019 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.development;
+
+import android.content.Context;
+import android.provider.DeviceConfig;
+
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class DeviceIdentifierAccessRestrictionsPreferenceController
+        extends DeveloperOptionsPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+
+    private static final String DEVICE_IDENTIFIER_ACCESS_RESTRICTIONS_KEY =
+            "device_identifier_access_restrictions";
+
+    public DeviceIdentifierAccessRestrictionsPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return DEVICE_IDENTIFIER_ACCESS_RESTRICTIONS_KEY;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        writeSetting((boolean) newValue);
+        return true;
+    }
+
+    private void writeSetting(boolean isEnabled) {
+        DeviceConfig.setProperty(DeviceConfig.Privacy.NAMESPACE,
+                DeviceConfig.Privacy.PROPERTY_DEVICE_IDENTIFIER_ACCESS_RESTRICTIONS_DISABLED,
+                String.valueOf(!isEnabled), false);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        boolean isEnabled = !Boolean.parseBoolean(
+                DeviceConfig.getProperty(DeviceConfig.Privacy.NAMESPACE,
+                        DeviceConfig.Privacy.PROPERTY_DEVICE_IDENTIFIER_ACCESS_RESTRICTIONS_DISABLED));
+        ((SwitchPreference) mPreference).setChecked(isEnabled);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        writeSetting(true);
+        ((SwitchPreference) mPreference).setChecked(true);
+    }
+}