[native] Create a restore backup screen

Summary:
Users are navigated to this screen after they provide credentials and wait here until the backup is restored.

https://linear.app/comm/issue/ENG-9680/create-a-restoration-screen

Depends on D14038

Test Plan: Click restore button on the password screen and check if this screen is displayed and looks correctly.

Reviewers: kamil, angelika, bartek, ashoat

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D14084