A connection is currently deleted if it has not recevied anything for
30s. This patch adds a field trial that allows modifying this value
if no pings are outstanding.
The motivation for this is to experiment with pinging slower than
once per 30s in order to save battery.
Bug: webrtc:10282
Change-Id: I3272b9d68d44fc30379bd9a6c643db6b09766486
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175005
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31239}