Don't pass HardwareAuthToken to unlockUser() in non-SP verifyCredential

While at first glance it looks like this is still needed, actually the
support for HardwareAuthTokens was already removed from vold in Android
12, so this cannot actually be doing anything.

Test: atest com.android.server.locksettings
Bug: 184723544
Change-Id: I3c176ba282f4c7901dd09fe3d66cfd380794fb48