The appearance or not of a smiley depends on the recipient, not the sender.
Ultimately, you're sending text; if you send a 'smiley' it gets encoded into an SMS as colon-slash-closebracket. The recipient's phone might then chose to display that sequence of text as a graphic, but equally it might not.
If you're looking for an option to embed an android into your text so that your iPhone owning friend gets a little picture of an android, it's not going to happen. It's all text.