Added WifiEntryPreference as WifiEntry version of AccessPointPreference

Added WifiEntryPreference and LongPressWifiEntryPreference to replace
AccessPointPreference using WifiEntry instead of AccessPoint.

Test: atest WifiEntryPreferenceTest && manual - visual verification with
dummy entries.
Bug: 70983952

Change-Id: I7234a9371737c32ee8d585c2802e4ce03a36a441