overlay: set 'config_deviceConfiguratorPackageName' to 'com.google.android.gms'

This is to fix the error 'java.lang.AssertionError: Permission: android.permission.WRITE_DEVICE_CONFIG cannot be granted to: org.protonaosp.deviceconfig'

Test: run gts-dev -m GtsDeviceConfigTestCases --test com.google.android.deviceconfig.gts.DeviceConfigApiPermissionTests#testWriteDeviceConfigPermission

Change-Id: I07814e72e7d24afca8f5c96fbe3fd51b578f65ea
diff --git a/overlay/gms/frameworks/base/core/res/res/values/config.xml b/overlay/gms/frameworks/base/core/res/res/values/config.xml
new file mode 100644
index 0000000..448c763
--- /dev/null
+++ b/overlay/gms/frameworks/base/core/res/res/values/config.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2013 The CyanogenMod Project
+               (C) 2017-2019 The LineageOS 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.
+-->
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <!-- Flag indicating which package name can access DeviceConfig table -->
+    <string name="config_deviceConfiguratorPackageName" translatable="false">com.google.android.gms</string>
+</resources>