Feature/android route notification (#868)

Add new feature to notify the user when new client route has arrived.
Refactor the initial route handling. I move every route logic into the route
manager package.

* Add notification management for client rules
* Export the route notification for Android
* Compare the notification based on network range instead of id.

iface/tun_android.go

@@ -25,16 +25,19 @@ type tunDevice struct {
 	wrapper *DeviceWrapper
 }
 
-func newTunDevice(address WGAddress, mtu int, routes []string, tunAdapter TunAdapter, transportNet transport.Net) *tunDevice {
+func newTunDevice(address WGAddress, mtu int, tunAdapter TunAdapter, transportNet transport.Net) *tunDevice {
 	return &tunDevice{
 		address:    address,
 		mtu:        mtu,
-		routes:     routes,
 		tunAdapter: tunAdapter,
 		iceBind:    bind.NewICEBind(transportNet),
 	}
 }
 
+func (t *tunDevice) SetRoutes(routes []string) {
+	t.routes = routes
+}
+
 func (t *tunDevice) Create() error {
 	var err error
 	routesString := t.routesToString()