Move connectivity AIDLs to android.net

INetworkAgent, INetworkAgentRegistry are moving to android.net.
Update the tests to reference the new location.

Bug: 171540887
Test: m
Merged-In: I77c4ea0dd3d9b64bae59b0e1c3fe8e1275de20de
Change-Id: I8593bcd4101ffe22327a72e4f6a0a001a64f8c5e
2 files changed