Handle IpReachabilityMonitor errors better.

If construction of a new IpReachabilityMonitor throws an IAE then
log it and immediately call onProvisioningFailure().

Test: runtest frameworks-wifi
      passes, except for selectQualifiedNetworkDoesNotChooseDeletedEphemeral()
      which fails with an NPE for unrelated reasons.

Bug: 31038971
Bug: 31742703
Change-Id: Ie91b8bdd509d06ad54d062bf446e74c092eb096c