DO NOT MERGE Cherry picking from MR0 cl 147215

DO NOT MERGE Cherry picking from MR0 cl 147215

Adding an improve face matching settings option for Face Unlock

Adding an option which will launch a version of setup where faces
can be added to the current gallery.  It requires the user to first
confirm their password before launching addToSetup.

Patch 3 - Updated for renaming of FackLockTutorial to SetupIntro.
Now it is called every time regardless of it it's showing the tutorial
and a flag is passed in to determine whether or not SetupIntro shows
the tutorial.

Patch 4 - Removed 'Setup Complete' toast at the end of screen lock
setups since it was primarily for Face Unlock and the congratulations
screen removes the need for it.

Change-Id: Idc5f960809d992ec7bbce59ef1e13b95ef7cce45