[lib] Only pass threadID to getMostRecentNonLocalMessageID

Summary: Some potential callers have RawThreadInfo instead of ThreadInfo, so this will make it easier to use this function from more places.

Test Plan: Flow

Reviewers: atul, subnub, palys-swm

Reviewed By: palys-swm

Subscribers: KatPo, zrebcu411, Adrian

Differential Revision: https://phabricator.ashoat.com/D808