Honour revoked publishing permissions for remote participants even if remote participants do not #5928

Extracted from #5693

The remote participants should honour their publishing permissions, but even if they do not, the clients should ignore the received streams of a remote participant without publishing permissions (similar to the safeguard applied to "force mute" messages):

• Do not try to connect to a participant without publishing permissions even if the participant is publishing
  • The HPB blocks offers from participants without publishing permissions, so this would not be strictly needed in that case
• Stop the connection with a remote participant when the permissions are revoked even if that participant keeps publishing
  • The HPB does not stop the connections when publishing permissions are revoked, so even with the HPB a remote client could misbehave