[web] Update sendTextMessage to accept MinimallyEncodedThreadInfos
Summary: Attempt to resolve Flow issue flagged by @ashoat here: https://phab.comm.dev/D9907#inline-61984
Test Plan:
- I patched the latest diff in your stack
- Observed the flow issue in web/input-input-state-container
- Made the same change as D9947 and ensured that the flow issue disappeared.
Reviewers: ashoat
Reviewed By: ashoat
Subscribers: tomek, ashoat
Differential Revision: https://phab.comm.dev/D9947