Start trust agents earlier on successful unlocks

Frequently, trust agents are not running because
a successful unlock is required for them to start.

Unfortunately, that means they were not able to receive the
successful unlock. To fix this, we'll now override
StrongAuth requirements and start agents early if we
detect a successful unlock.

Bug: 23021202
Change-Id: Ie85f78d9ce2823dd5c9b6215a52db069fb796d91