Update PRE_BOOT_COMPLETED for FBE.

Now that CE data isn't available until after a user is unlocked, we
need to delay the PRE_BOOT_COMPLETED broadcasts.  This is done by
adding a new RUNNING_UNLOCKING user state to the UserController
lifecycle.

We now track the last fingerprint a user was logged in under, and we
dispatch PRE_BOOT receivers when that fingerprint changes.  To work
around battery pull issues, we only persist the updated fingerprint
once all PRE_BOOT receivers have finished.  This is less granular
than the original solution, but it's still correct.  We only consider
a user as "logged in" once it transitions into the RUNNING_UNLOCKED
state.

When starting a process, track if the user was "unlocked" when
started, so that we only spin up unaware providers in processes
started before user unlock.

Add generic IProgressListener to communicate PRE_BOOT progress and
strings up to lock screen.  For now, LockSettingsService just blocks
until finished, but it could display these strings in the future.

Bug: 27220885
Change-Id: I349439776b885acd32f6a578d8951ffd95640be2