[WifiNetworkSelector] Set metered bit in candidate

This was done incorrectly. A null WifiInfo needs to passed in if the
network is not current.

Bug: 149576261
Test: atest com.android.server.wifi
Change-Id: I779a72bf9b9e3ff2c8316ce154a0c0189d5da810
1 file changed
tree: 3f944f13c9f698ceb743a5f532f3caf93ebc97eb
  1. apex/
  2. service/
  3. PREUPLOAD.cfg