Move TcpKeepalivePacketData out of the framework. am: 82f2a72d01
am: 63a7fe7a9b

Change-Id: I5f90bdf3993c472f5564164e17106d2a59233656
tree: 16311b64ba617bcf3bf8934d5e516389fbf119a3
  1. core/
  2. services/
  3. tests/