WifiConfig corresponding to a PasspointConfiguration is not shared by default

Default WifiConfiguration must be created to not be shared, so that
a new device user is unable to stay connected to passpoint configuration
that was created by another user. The WifiConfig returned should correspond
to the PasspointProvider in terms of sharing preferences with other users.

Bug: 67854131
Change-Id: Ib26fd970062181426c7f04c75aae088b9a040e18
Test: Unit tests and bug repro
5 files changed