When checking for the credentials, we add a new callback
onEarlyVerified which gets called as soon as we know that the
credential was correct.
In KeyguardUpdateMonitor, we track the unlocked state of the user,
and if it's still locked, we slow down all the transitions to allow
for a more gradual unlock experience.
Bug: 29007436
Change-Id: I406d228f9f3e41e07fe3292a61df175a7f579e4d
e8fde5d966