They weren't on the list last year either. That's because they weren't exhibitors last year. They were there though. They're not exhibiting this year because they still don't have anything to sell. According to the "Letter to Shareholders" they'll decide by the end of this month which smartphone(s) they will be selling.
Excerpt from letter:

"my goal is to have a price point diversified smartphone offering, which can be either purchased directly from Andiamo as-is or customized to fit a customer’s brand image. I believe with the strength of Utopya in the delivering of great smartphone and mobile technology, we can accomplish the initial stages of choosing those products by the end of Q2 2019, which for us is January 31st."

Last year they were there to make contacts. Looks like it would be a good idea to be there this year for the same reason.