Check the status code option inside IA_PD in RequestState.

Ignore any Reply for the Request with NoPrefixAvail status code option,
client should roll back to SolicitState and restart the configuration
process.

Bug: 317161875
Test: atest NetworkStackIntegrationTests
Change-Id: Id40200fb8cf067b395feb4ab857739b5eeafa04b
2 files changed