Set "has no children" capability on IMS conferences.

- By default setting "has no childen" capability on ims conferences.
- Handling case where conference event package data arrives (setting on
the conference capabilities).
- Fixed a bug where a change in the conference capabilities due to arrival
of a conference event package were not actually being communicated to
Telecom.  Previously the addCapability and removeCapability methods were
used; those do not call the callback to notify listeners of the change.
Calling setConnectionCapabilities does, however, notify
listeners.

Bug: 21085329
Change-Id: Id4a65a048cea81c836868d948e2aa1ce2639439e
1 file changed