Add ability for custom attributes in Segment

Requested: https://podcastindex.social/@mitch/110507842606774970

Referenced extra loop to add after

https://github.com/podverse/podverse-rn/commit/5916dd8ac1ef3e54276b9efa8e6a9c62c206a58b#diff-09de177cce11784e52661dfb17bc68415c34b7095a0a738058cf66d75a2bc703R17