Use NetworkCallback in BatteryStatsService to get connectivity change

Currently, battery stats service uses noteConnectivityChanged in
connectivity service(CS) to pass connection state and the type of
connection for BatteryStats. However, CS is going to be a mainline
module which can only access formal API. noteConnectivityChanged
is a hidden API and it pass LegacyNetworkType which has been
deprecated years ago, so it should avoid to expose this API with
a deprecated argument. Thus, register a NetworkCallback in
BattyeryStatsService to listen the network capabilities changed to
remove the noteConnectivityChanged from connectivity service.
Besides, let noteConnectivityChanged take display transport instead
of legacy network type.

Bug: 171686421
Test: atest FrameworksNetTests
      atest FrameworksCoreTests:BatteryStatsTests
Change-Id: I3dac94ec06f673aa719e124f1ef3d8169f68f9fb