fix android route and peer conn disconn bug

1. android correctly add route
2. use mock nic ctx to consume packets

tauri-plugin-vpnservice/android/src/main/java/TauriVpnService.kt

@@ -90,7 +90,7 @@ class TauriVpnService : VpnService() {
         for (route in routes) {
             val ipParts = ipv4Addr.split("/")
             if (ipParts.size != 2) throw IllegalArgumentException("Invalid IP addr string")
-            builder.addAddress(ipParts[0], ipParts[1].toInt())
+            builder.addRoute(ipParts[0], ipParts[1].toInt())
         }
         
         for (app in disallowedApplications) {