[AWARE] Verify IPv6 address before declaring network fullfilled

The Aware interface is configured using network utilities - but the
network stack may not be ready immediately. There is currently no
mechanism to get a callback when configuration is done (TBD) so
looping internally trying to bind to the interface until validated
or timed out.

Bug: 123096306
Test: atest com.android.server.wifi.aware
Test: ACTS DataPathTest
Test: ACTS DataPathStressTest
Test: ACTS ThroughputTest
Change-Id: Iae7294c88c2842848f113b122d4de6c4f7fd5900
6 files changed