Always show wifi wake setting.

Remove WIFI_WAKEUP_AVAILABLE config setting its available by default.
Remove check for NETWORK_RECOMMENDATIONS_ENABLED, the feature no longer
uses the recommender.

Test: make RunSettingsRoboTests RunSettingsLibRoboTests;
Test: atest SettingsBackupTest; manual/exploratory
Bug: 69624403
Bug: 67952636
Change-Id: I9e287b79d0da01bab00ed81295dcc1f266ca0851