use tun2

meh/rust-tun has bug on windows and may stuck on large traffic.

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

@@ -88,7 +88,7 @@ class TauriVpnService : VpnService() {
         builder.addDnsServer(dns)
 
         for (route in routes) {
-            val ipParts = ipv4Addr.split("/")
+            val ipParts = route.split("/")
             if (ipParts.size != 2) throw IllegalArgumentException("Invalid IP addr string")
             builder.addRoute(ipParts[0], ipParts[1].toInt())
         }