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

src/com/android/settings/ChooseLockPattern.java

@@ -35,7 +35,6 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
-import android.widget.Toast;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -513,8 +512,6 @@ public class ChooseLockPattern extends PreferenceActivity {
             utils.saveLockPattern(mChosenPattern, isFallback);
             utils.setLockPatternEnabled(true);
 
-            Toast.makeText(getActivity(), R.string.lock_setup, Toast.LENGTH_SHORT).show();
-
             if (lockVirgin) {
                 utils.setVisiblePatternEnabled(true);
                 utils.setTactileFeedbackEnabled(false);