Change properties of olm account updater so that the callback can use pickling key as well

Summary: This differential changes signature of olm updater so that the callback can use the pickling key.

Test Plan: Execute test plans for: D7568 and D7631

Reviewers: tomek, bartek, atul, ashoat

Reviewed By: ashoat

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D7798