Right, from what I understand NFS does not differ from cifs wrt. mounting. But as you noted about a possibility to build cifs module, is it supposed to work somehow with this >=4.2 problem?Ah right, I sorry misunderstood. I know Google only allow mounts to be seen by the app doing the mounting since 4.2. Not sure how NFS differed from a cifs setup?
I personally use es file explorer which sees my network PCs and drives fine and allows me to share files that way.
I also use file browsers to access cifs shares, but I wanted to try NFS, since it is much faster, and I am not aware of any file browser supporting it, so it's natural to simply mount it. Unfortunately Google has complicated this path