Summary:
As discussed with lblasa. This solves a few issues:
- Confusing names in `ps` and Activity Monitor related to Flipper.
- Permission requests for the Keychain from "node" lead users to deny it.
- Seeing "node" as allowed apps for an entry in Keychain is confusing.
Reviewed By: lblasa
Differential Revision: D50232337
fbshipit-source-id: 3bc92aae0ca31d1a80582fb8a794bbc64fc2f2e5