Revert "Revert "Test IPv6ProvisioningLossParcelable in the NetworkAttributes""" am: 42c643a2e5 am: 1145cdcefe am: e26d6ebc1c am: 83d8f80c39

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1460264

Change-Id: I0c28f689e056dc4ac5d6750c9f5c74ce49c8a103