[lib] add sending Tunnelbroker message with already defined messageID

Summary: Messages to other devices are generated when processing store ops, that's when messageID is generated, and we want to send it without generating new one.

Test Plan: Test sending Tunnelbroker messsages

Reviewers: tomek, bartek

Reviewed By: bartek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D12076