First and foremost: this is a user forum, you're not going to get an official statement on anything here.
Second, what camera are you using, what app?
My Galaxy S5 hasn't been updated yet, but a look at the EOS Remote app says it supports 5.0 (Lolipop). I see from some of the comments that there's been some issues since the update, but that's par for course for any major software change. Regardless of the first Androids being released with 5.0, you can't expect third party manufacturers to stay current with state of the art, especially on this sort of thing. The general public with "old" devices - that is, ones not purchased in the last couple of months - are just now getting the update rolled out.
Lastly: again, I don't know what kind of camera you have, but my experience with the 6D is that RAW files are way, way, way too big to waste time with wireless transfer. I love WiFi for controlling my camera and seeing Live View, but when it comes to downloading I simply pull out my SD card and stick it in my computer. Just a thought.
