[SQLite] add method for message search to SQLiteQueryExecutor for both web and native

Summary:
Defining API, logic will be implemented in searchMessages in the next diff.

Depends on D12833

Test Plan: N/A, just defining method arguments and returned type

Reviewers: tomek, inka

Reviewed By: tomek, inka

Subscribers: marcin, ashoat

Differential Revision: https://phab.comm.dev/D12843