[MEDIUM] Fix Local Network permissions in MacOS App

[rltakashige]

Context: The MacOS app requires Local Network access (in System Settings -> Privacy & Security) in order to allow devices to discover each other.

Issue: This is configured correctly upon install of the app, where a pop-up requests Local Network access. However, upon restart, devices no longer discover each other until turning Local Network for the Exo app off and on again (with the app closed).