[Due for payment 2026-01-28] [GPS mileage expenses][Release 1] - Define a long-running task for handling location changes

# Part of the GPS mileage expenses project - Release 1
Main issue: https://github.com/Expensify/App/issues/73261
Doc section: [Design doc section](https://docs.google.com/document/d/1U1rMgaWvovEJqEeBMtgDkvOZMO8FI3mhp96MWA-TsL0/edit?tab=t.0#bookmark=id.yrmzxy2ycb6k) - Define a long-running task for handling location changes



