Hide "Availability" and "Calendar" on user profiles for disabled users

Summary:
See downstream https://phabricator.wikimedia.org/T138723. That suggestion is a little light on details, but I basically agree that showing "Availability: Available" on disabled user profiles is kind of questionable/misleading.

Just hide event information on disabled profiles, since this doesn't seem worth building a special "Availability: Who Knows, They Are Disabled, Good Luck" disabled state for.

Test Plan: Looked at disabled and non-disabled user profiles, saw Calendar stuff only on the former.

Reviewers: amckinley

Reviewed By: amckinley

Differential Revision: https://secure.phabricator.com/D20342