Prepare SQLiteQueryExecutor for single thread retrieval

Summary: This diff extends SQLiteQueryExecutor API to include method to retrieve single thread based on its ID

Test Plan: No testing plan. Further diffs will use this functionality and provide appropriate testing plan.

Reviewers: palys-swm, atul, varun

Reviewed By: palys-swm

Subscribers: ashoat, Adrian, yayabosh

Differential Revision: https://phab.comm.dev/D4234