Facebook Android integration in Unity 5.6

Facebook should be integrated into Unity 5.6 and up. I installed 5.6 with Fb target included, just in case, even if I am not building on Fb platform. However, I seem to be unable to use FB API (as in the old Fb SDK) in my Android builds. Can not even find Facebook namespace and so forth.

So, is the Fb integrated or not, and how to access it?

have you answer?

It is integrated, but this is only done for Windows and WebGL targets, see this article - https://developers.facebook.com/blog/post/2016/11/01/unity-editor-beta/