tree 4ec00995da6d2ce6afcb5e7b08a7ab76f9f56093
parent f144f6ecd9386eba9cb516bec42c07295e3f9765
author Tyler Gunn <tgunn@google.com> 1501864046 -0700
committer Tyler Gunn <tgunn@google.com> 1503938444 -0700

Track conference start in system elapsed time.

This is important so that Telecom can track the duration of the call,
which is tracked using wall clock time.

Test: Manual, unit test
Bug: 64068300
Merged-In: If642d282cd8134060acf6ffe8d81215c394d800c
Change-Id: If642d282cd8134060acf6ffe8d81215c394d800c
(cherry picked from commit b2f875bc5468eec359dfbbe8697f94d7734cafed)