Update Dhcp6Client#BoundState to support multiple IA prefix options.

We should have a check on each IA prefix option and install the global
IPv6 address derived from that IA prefix option, therefore, it requires
to use a loop to iterate each IA prefix option in the list, but exclude
the invalid prefixes.

Bug: 260934173
Test: atest NetworkStackIntegrationTests
Change-Id: I635e9e599d668954b4a9ad287a2a99f06c1bb0a2
3 files changed