Revert "Revert "WifiAp: Bring back support for legacy interface""

This reverts commit ef2441c12e6a773484760fdb8e8c3835471399a8.
Revert "QuickSettings: Data off Overlay icon"

This reverts commit 5fcc9705400f7a73e10a5978d26bd00ea71ec37a.
QuickSettings: Data connectivity actions