Bug 1911779 - Default to including the URL in crash reports a=dmeehan

This default is used when the crash reporter has never been launched
before. Notably, this is currently a user-global setting (as opposed to
per-profile), so the defaults will typically only be used when someone
hasn't ever had Firefox installed on their system.

Original Revision: https://phabricator.services.mozilla.com/D218887

Differential Revision: https://phabricator.services.mozilla.com/D219152