Add READ_DEVICE_CONFIG for docsUI

Bug: 320414608
Test: builds and boots
Change-Id: Id32a44d0bde08bd47f0d279235768a3dd61572a6

data/etc/com.android.documentsui.xml

@@ -23,5 +23,7 @@
         <permission name="android.permission.MODIFY_QUIET_MODE"/>
         <permission name="android.permission.READ_COMPAT_CHANGE_CONFIG"/>
         <permission name="android.permission.START_FOREGROUND_SERVICES_FROM_BACKGROUND"/>
+        <!-- Permissions required for reading device configs -->
+        <permission name="android.permission.READ_DEVICE_CONFIG" />
     </privapp-permissions>
 </permissions>