[Tunnelbroker] implement marking device token ad invalid

Summary:
ENG-8498.

Setting flag in DDB informing that device token is no longer working.

Depends on D12908

Test Plan:

1. Test that marking works
2. Test that adding device token is not marked as invalid

Reviewers: bartek, marcin, tomek

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D12909