[native] Don't make Crash.onPressWipe an async function

Summary:
While working on the unused-promise Flow lint, I noticed that there is no await keyword here, so there's no point to it being an async function.

Depends on D10169

Test Plan: Flow

Reviewers: bartek, michal

Reviewed By: michal

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D10170