Route PPBR export directory policy through platform services

src/platform_windows/windows_platform_services.cpp

@@ -464,6 +464,11 @@ public:
         return pp::platform::default_disables_network_tls_verification();
     }
 
+    [[nodiscard]] bool uses_ppbr_export_data_directory_override() override
+    {
+        return false;
+    }
+
     [[nodiscard]] bool supports_sonarpen() override
     {
         return false;