[Passpoint] Fix provider removal for factory reset and multiple providers with same FQDN

Fix Passpoint provider removal for factory reset and multiple
providers with same FQDN.

Bug: 149776782
Test: atest PasspointManagerTest WifiServiceImplTest
Test: Manually run Wi-Fi factory reset from Settings
Change-Id: I4518bf2c9f7af6790a223d06126e1ed7d9063096
4 files changed