[SQLite] recreate table for Inbound P2P messages

Summary:
ENG-6982.

1. Rename the table to reflect to existing naming.
2. Add a column with userID; it turns out it is needed for some messages.

I am dropping the table because right now it should be empty for users.

Depends on D13046

Test Plan:

1. Migration succeeded.
2. Creating DB from scratch works.
3. Tests

Reviewers: tomek, marcin

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13047