WifiEnterpriseConfig: New copy method to ignore masked password

To ignore the masked password sent by apps, add a new copy-constructor
equivalent method which will ignore the masked password.

Bug: 62893342
Test: Unit tests.
Test: Manual tests with the linked CL.
Test: Regression tests.

Change-Id: Ib208dcd94a888e07a9b3dc0442620233ea7791e5
2 files changed