Fix passpoint suggestions not showing SSID in Network Details

Settings shows the SSID in Network Details if WifiEntry.isSubscription()
is true, which isn't true for passpoint suggestions. To fix this, add a
new method "shouldShowSsid()" to explicitly tell Settings to show the
SSID preference.

Bug: 300205461
Test: atest WifiTrackerLibTests
Change-Id: I59a1fd6051d6048c771a04abb6b4ce91ce1af3f4
2 files changed