I don't think it's as clear cut as that. You'll have iOS devices and a few Windows Phones too. Plus on Android it's pretty common (albeit mostly among power users) to install custom browsers like mobile ports of Firefox. Then you have other devices like games consoles. Things get pretty fragmented pretty quickly once you start investigating the "other devices" rabbit hole.

However that all said, when it comes to product support, I've found product owners generally only care about Blink (Chrome / whatever) on Android and Safari on iOS. So there's usually little interest in all the other random browser + platform combinations seen in "other devices".