NotificationCompat.Builder is deprecated

private void sendNotification(Context context, String dnsModel) {
    Intent intentAction = new Intent(context, MainActivity.class);

    intentAction.putExtra("dnsModel", dnsModel);

    PendingIntent pendingIntent = PendingIntent.getActivity(context, 1, intentAction, PendingIntent.FLAG_ONE_SHOT);

    notificationBuilder = new NotificationCompat.Builder(context)
            .setSmallIcon(R.drawable.dns_changer_ico_inverse)
            .setContentTitle(context.getString(R.string.service_ready))
            .setContentIntent(pendingIntent)
            .addAction(R.drawable.ic_vpn_lock_black_24dp, context.getString(R.string.turn_on), pendingIntent)
            .setAutoCancel(true);

    Notification notification = notificationBuilder.build();

    notificationManager.notify(1903, notification);

}

I've tried using NotificationCompat.Builder(Context context, String channelId) but I'm getting more errors on Context context and I have absolutely no ideea on hot to add a ``channelId`.

Creating a notification channel is not that hard.
Here is some code: https://developer.android.com/training/notify-user/channels#CreateChannel

You can execute that code in your MainActivity or your Application class on app startup.

Once you created the channel id, you can use it with
NotificationCompat.Builder(Context context, String channelId)

EDIT

The CHANNEL_ID is a simple String.
You can for example add this to a constants file:

public static final String CHANNEL_ID = "your.package.name.notificationChannelId"

You can now use this constants hwen creating your notification channel and when calling NotificationCompat.Builder(Context context, String channelId)