[lib] Fix rawMessageInfoFromClientDB to exclude id from local image messages

Summary: See D2601, but for image messages.

Test Plan: Our SQLite store and Redux store are no longer different

Reviewers: def-au1t, palys-swm, ashoat

Reviewed By: palys-swm, ashoat

Subscribers: ashoat, Adrian, karol-bisztyga, benschac, boristopalov

Differential Revision: https://phabricator.ashoat.com/D2602