[lib] Update ClientCheckStateServerRequest to contain MinimallyEncodedRawThreadInfos
Summary:
Update ClientCheckStateServerRequest.stateChanges.rawThreadInfos to contain MinimallyEncodedRawThreadInfo[]. This lets us remove the invariant in thread-reducer.
Depends on D10609
Test Plan: flow
Reviewers: ashoat, ginsu, tomek
Reviewed By: tomek
Differential Revision: https://phab.comm.dev/D10624