The patch adds tests for D216762 and D216762.
Tests verify the following:
- Events dispatched by the password-validation-inputs component
- Password validation
- turn-on-scheduled-backups and enable-backup-encryption interactivity modified inputs
Additional changes:
- adding a head.js file for chrome tests
- moving some helper functions used by browser and chrome tests to their respective head.js files
Differential Revision: https://phabricator.services.mozilla.com/D216892
c08f380406