Back 2 years or so I created a workflow which allowed to work in Nuke and have realtime preview in Oculus. It was a big thing back then and kept as a secret
As far as I understand Samsung Gear works with phone and phone is the screen driver, so it may not be possible at all to have realtime preview from Resolve.
Phone's HDMI is in this case an output, not input, so this is the problem.
There maybe some other, clever way
With Oculus this is possible.