tree f9bf0e1d430eba159df6f1b55b28fd742401f987
parent 87e4a8a9d20e022c067ad98ba5165f5ae491a841
author Tyler Gunn <tgunn@google.com> 1453845591 -0800
committer Tyler Gunn <tgunn@google.com> 1455248668 -0800

Register OnHoldTone event

Send a connection event to Telecom which will cause it to play or stop
the on hold tone.
Also ensure that we only start/stop the hold tone for the connection it is
associated with.

BUG=25357778

Change-Id: Ib1aafbcea69ea24534ba2b9af175e524a1416446