Use ApplicationSearch in Owners

Summary:
Ref T8320. Modernize search and major interfaces.

This slightly regresses some list view and search features; I'll probably restore some later (once the Query has proper needX(...) methods) and drop the rest.

Test Plan: Browsed, edited, deleted, and created packages.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8320

Differential Revision: https://secure.phabricator.com/D13024