My understanding is that Fedora is upstream of RHEL, and more of a “sister” than a “descendent”. I don’t believe it will be affected at all.
Of course, Red Hat may yet put less effort into maintaining Fedora to increase profitability (they’re a huge sponsor), but it will not be going proprietary. I think Fedora is a safe bet.
yh, my fp4 came with stock android+google