[native] Fetch coordinates from context in nux tips overlay

Summary:
issue: ENG-8617
As discussed in previous diff, we want the tip to fetch its coordinates from the context, instead of getting them in the route params

Test Plan: tested with following diffs, tested that the tip can be displayed and it fetches its coordinates correctly

Reviewers: tomek, will

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13079