Remove WirelessSettings and related code not used in new IA.

- remove WirelessSettingsActivity and update other references to it.
- move the intent filter android.settings.WIRELESS_SETTINGS and
  android.settings.AIRPLANE_MODE_SETTINGS into Network dashboard
- move intent filter android.settings.NFC_SETTINGS into Connected
  devices dashboard.

Change-Id: I84f75ac45d0712eac9c40aa6c8f052bc060ed03a
Fix: 32342061
Test: make RunSettingsRoboTests