Freeze networkstack-aidl-interfaces to version 16

This AIDL freeze includes 1 new boolean to represent a network with
IPv6 link-local only and uses EUI-64 address generation in
ProvisioningConfigurationParcelable.

Bug: 258449807
Test: NetworkStackIntegrationTest NetworkStackTests
Change-Id: I2b071f3782981908c78811fac647a81ed3a38071
29 files changed