[lib] render PeerToPeerMessageHandler in PeerToPeerProvider

Summary:
After D12997 usePeerToPeerMessageHandler uses PeerToPeerProvider so we need to update this to be a nested component.

Depends on D12997

Test Plan: Run web & native app and make sure everything works.

Reviewers: bartek, tomek

Reviewed By: bartek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D12998