Only display RSSI/band information if network is connected.

Change the verbose AccessPoint summary to only display visibility summary
if it is the currently connected network.

Note: This does not fix the underlying behavioral issue where
WifiTracker does not correctly null out the AccessPoint's mWifiInfo.

Bug: 62317380
Test: manual

Change-Id: Idcdd182200d2d2ded6b3200b67c4ed654d45a9b7
(cherry picked from commit 3c4f4ffc)