Add a disabled reason for recommendation providers

Display a message indicating that a saved networks has not been
automatically connecting due to low quality if
WifiConfiguration#mNotRecommended is set.

Bug: 34745259
Bug: 35671673
Test: m RunSettingsLibRoboTests && runtest frameworks-wifi
Change-Id: I275e2711da68715fb6d92bf954e9f58a3386b1f4
Merged-In: I275e2711da68715fb6d92bf954e9f58a3386b1f4