Commits
Hung-ying Tyan authored 4a267a9158a
Move the keepalive process to SipSessionImpl and make it reusable. Reuse the new component in the original keepalive process and the NAT port mapping timeout measurement process. This is the foundation for fixing the following bug. Bug: 3464181 Change-Id: If7e951c000503fa64843942ad062c4d853e20c8d