Messenger example - reset authenticated channel

• Add ResetAuthFeature library to xx-messenger example.
• Implement resetting authenticated channel with provided contact.
• Fix reset auth callback handler in xx-messenger example.

requested review from @brunomunizaf

assigned to @darrarski.xx

added 1 commit

• 5ab6763b - Fix reset auth callback handler in example app

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changed the description

added 1 commit

• 54a6b608 - Fix tests

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enabled an automatic merge when the pipeline for 54a6b608 succeeds

mentioned in commit 2ec03685

merged