Add route management for Android interface (#801)

Support client route management feature on Android

client/internal/routemanager/server_android.go

@@ -0,0 +1,21 @@
+package routemanager
+
+import (
+	"context"
+
+	"github.com/netbirdio/netbird/iface"
+	"github.com/netbirdio/netbird/route"
+)
+
+type serverRouter struct {
+}
+
+func newServerRouter(ctx context.Context, wgInterface *iface.WGIface) *serverRouter {
+	return &serverRouter{}
+}
+
+func (r *serverRouter) updateRoutes(routesMap map[string]*route.Route) error {
+	return nil
+}
+
+func (r *serverRouter) cleanUp() {}