Samsung released the Galaxy Note 7 earlier this month which which added support for emoji flags, and now has in the works a much larger emoji update.
Above: Samsung's Forthcoming Unicode 9 Emojis.
Skin tones are supported in this upcoming release, but in an odd implementation detail, the default shade remains white.
Other platforms tend to make the default human emojis yellow, with skin tones an optional extra.
Above: Samsung makes default-yellow white as well.
All human characters are to support skin tone modifiers, including the latest Unicode 9 additions.
This update is not yet available for users, and no public release date has been provided by Samsung.
Note: this is speculation. ↩