As connectivity services are planned to move to a separate module, move
the manager classes registration from SystemServiceRegistry to
ConnectivityServicesRegistrar, using the registerContextAwareService
APIs.
This follows patterns and naming in WifiFrameworkInitializer.
Bug: 171540887
Test: device boots, connectivity working
Change-Id: I62ced1275750c73f209bac8ec3a3204b95695b83
Files that are planned to be part of the connectivity module are grouped
in packages/Connectivity, so they can be built separately and moved in
one operation with their history into packages/modules/Connectivity.
This places the files in the existing framework-connectivity-sources
filegroup instead of the current framework-core-sources filegroup. Both
are used the same way in framework-non-updatable-sources.
Bug: 171540887
Test: m
Change-Id: I62d9d91574ace6f5c4624035d190260c3126b91e
