From hierarchical view, one of root cause is PreferenceCategory.
Looks like PreferenceCategory generates an invisible space when
we add a footerPreference as a child.
So, we remove PreferenceCategory directly, and declard "allow divider"
attribute for neccessary preferences.
Test: Visual
Fixes: 130396913
Change-Id: I6d56ac165633aa211e794e07417821066380d041
This change connects the face status preference controller with the
settings fragment/activity. This change also implements the basic settings
page showing a video, a toggle for keyguard, improve/remove targets,
and footer.
Bug: 111321762
Test: manual
Change-Id: Ifc65f5acbf6551679074df63ef22ffba75229f37
