GitLab

Added code to detect if google-services plugin is correctly setup to prevent crash when creating the Core on Android

- further implement RFC4575 media events
- the conference sends out the conference capabilities in its full state notify
- when the conference media change, a media event will be sent out to inform participants (onAvailableMediaChanged)
- when a remote participant pauses its call and conference event package is enabled, a participant device media changed event is sent (onParticipantDeviceMediaChanged)
- prevent that a core that supports the event conference package pauses individual calls in a conference
- rework of address comparison using belle sip functions
- add conference parameter to allow conference with one participant

Fix crash when receiving ICE password and ufrag in SDP media description rather than session description. Add tests.

Fix "Conference with simple audio device change" after mixer takes into account cores that use files instead of sound cards

Changed how listeners are implemented in Java wrapper, now taking global ref on listener in native objects to allow using lambdas & inner classes

Added @donotwrap to methods deprecated for more than 2 years + removed single listeners from Java wrapper

Flagged by valgrind: Conditional jump or move depends on uninitialised value(s)

(cherry picked from commit 7735eb9a)