The old way was garbage-heavy. To add to that some changes to the way
PreferenceScreens are redrawn was leading to some artifacts with items
fading in/out every tick.
Bug: 25588385
Change-Id: Idabf7546ab519bf196ad3b8582caa2ec6bf9e084
VPN apps are shown alongside configured VPNs now. The requirement that
a password is set is now only enforced when setting up a configured
VPN as this is not necessary for apps.
Some UI redesign.
Bug: 19573824
Bug: 17474682
Bug: 19575658
Change-Id: I02bd977136929647d65b9784fb4cc5df24b45428