The Apple logo is at Unicode code point F8FF, which is in the Private Use Area. That is: this is not an official Unicode symbol. If your font (or system) doesn't support it you won't see it. Of course, Android doesn't have this non-standard symbol (and neither does Windows, AFAIK).
In other words: there is no way to have the Apple Logo appear on all devices using Unicode text alone. You would need to send an image.