tree 9a61be5d44898217eef54bf55d8350a56348e34e
parent c9e54c43f68ce675c8ff5283942b5e364c6d75f3
author Yang Liu <yangxliu@google.com> 1410989521 -0700
committer Yang Liu <yangxliu@google.com> 1411086794 -0700

Add code support for tracking data connection state.

Add Rpc to get current data connection state.
Add Rpc to start/stop tracking data connection.
Add pop event for data connection state change.

Change-Id: Iad24368a76194fcb1f4959f7c5cd6b8a7203c8e0