This patch takes advantage of the direct DefaultNetworkMetrics interface
between ConnectivityService and IpConnectivityMetrics and removes the
Parcelable interface from DefaultNetworkEvent.
IpConnectivityMetrics, IpConnectivityEventBuilder and associated tests
are updated as necessary.
Bug: 34901696
Test: runtest frameworks-net
Change-Id: I59b6e04fc126051320d08a422cfbd4d27042123e