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

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

Change-Id: If0b8d031b80b9cd8315327211ede0be1a58df44f