Show connection error reason for Passpoint AP

Currently "Available via <provider friendly name>" is always shown
in the summary with Passpoint AP, even connection error happens,
so user might not notice the error happens.

Better to show error reason when connection error happens,
so that user can notice the error and take actions to solve it.

Bug: 35190091

Change-Id: If0d06e800df8de3119590372feda946457aab5e6
1 file changed