[Wi-Fi] Remove the files which use SettingsLib Wi-Fi objects

This change removes

AddDevicePreferenceController
WifiDetailPreferenceController
WifiMeteredPreferenceController
WifiNetworkDetailsFragment
WifiPrivacyPreferenceController

Bug: 152571756
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.wifi
Change-Id: Id4901d632f7f4634461ebbbc096e36d348a33365
13 files changed