[web] Use hook instead of connect in InputStateContainer

Test Plan: Checked if main content was still being rendered, and that sending text messages / multimedia still worked correctly

Reviewers: palys-swm, ashoat, atul

Reviewed By: ashoat

Subscribers: ashoat, KatPo, zrebcu411, Adrian, atul

Differential Revision: https://phabricator.ashoat.com/D852