Deleting Visibility from WifiConfiguration

Removing @hide class that's not being used.

Bug: 74019502
Test: compile, run ./frameworks/base/wifi/tests/runtests.sh
This is CP from master fbce0f15544edc80b1ae49061f6fee365e3a2fea

Change-Id: I8b364bfa09f6fe6a585fbec01e5ff94b8b745bca
1 file changed