am 017223ac: Merge changes from topic \'packet-keepalive-fixes\' into mnc-dr-dev
* commit '017223acda5bfe16cb87d0a33d72dd28d2fccd3b':
Require the new PACKET_KEEPALIVE_OFFLOAD permission.
Add an error code for generic hardware error.
Fix bugs and crashes in PacketKeepalive API.
Add tests for the PacketKeepalive API.
Add a PACKET_KEEPALIVE_OFFLOAD permission.
Use a CountDownLatch instead of sleep() in NetworkFactory tests.
Get rid of shortSleep() in ConnectivityServiceTest.
Make ConnectivityServiceTest a bit more readable.