Bug: 14993295
Hooks up a ConnectivityManager.NetworkActiveListener.
Previously was using 3 locks where 1 would suffice,
negligible to no performance issues b/c most of the previous locks
were nested.
Added OnNetworkActiveListener so that the ConnectivityController can kick of
tasks when it knows that the network is active.
Fixed some bugs that stopped timecontroller from executing tasks.
Requesting a retry will not add a deadline to that task. However backed-off
tasks are run as soon as they are ready, subject to their constraints.
Added receiver to listen for package removal and user removal, which will
delete any outstanding jobs for that uid.
Change-Id: I4c4523af558b927f19b8a215878fcc7198abb93f
effacfa75b