Feature/exit node Android (#1916)

Support exit node on Android.
With the protect socket function, we mark every connection that should be used out of VPN.

client/android/client.go

@@ -1,3 +1,5 @@
+//go:build android
+
 package android
 
 import (
@@ -14,6 +16,7 @@ import (
 	"github.com/netbirdio/netbird/client/system"
 	"github.com/netbirdio/netbird/formatter"
 	"github.com/netbirdio/netbird/iface"
+	"github.com/netbirdio/netbird/util/net"
 )
 
 // ConnectionListener export internal Listener for mobile
@@ -59,6 +62,7 @@ type Client struct {
 
 // NewClient instantiate a new Client
 func NewClient(cfgFile, deviceName string, tunAdapter TunAdapter, iFaceDiscover IFaceDiscover, networkChangeListener NetworkChangeListener) *Client {
+	net.SetAndroidProtectSocketFn(tunAdapter.ProtectSocket)
 	return &Client{
 		cfgFile:               cfgFile,
 		deviceName:            deviceName,