[NS13] Remove the last usage of the legacy int

Note that this requires removing part of a test, because
that part is testing that the a 50 bonus of the legacy
int is stronger than the validation penalty, which is
not a mechanic we want to have. When WiFi is unvalidated
and cell is unvalidated, cell should be kept in case it
validates, like is described in comments in
isNetworkPotentialSatisfier ; however this test is
checking that it *IS* reaped off if the wifi score is
strong enough. This should be incorrect, and should not
be tested, so this patch removes the check.

Test: ConnectivityServiceTest
Bug: 184834350
Change-Id: I8966abee59fea2d9f10f082aba87df6588b72762