overlay: Delegate DeviceConfig permissions to custom provisioning service

Our custom SimpleDeviceConfig provisioning service needs to be defined
here in order to receive the correct permissions.

Change-Id: I7dd65ec9b732fb999a78627538d883f61cb237a4

overlay/common/frameworks/base/core/res/res/values/config.xml

@@ -102,4 +102,7 @@
         <item>com.linkedin.android</item>
         <item>com.tencent.mm</item>
     </string-array>
+
+    <!-- Flag indicating which package name can access DeviceConfig table -->
+    <string name="config_deviceConfiguratorPackageName" translatable="false">org.protonaosp.deviceconfig</string>
 </resources>