Fix bug of not showing locked icon in WifiSettings

This bug only exist by launching WifiSettings from quick settings. Quick
settings launch this page by intent, where we use Theme.Settings.
However we only have frictionIconColor in Theme.SubSettings, not
Theme.Settings.

This CL move related attr to correct theme, so we won't show invisible
icon anymore.

Bug: 120710149
Test: Manual
Change-Id: Iae07f6ca19eda0bfbc352f03787b5a583c4066f2