[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