call: use participant info for conference layout

...rc/main/java/cx/ring/adapters/ConfParticipantAdapter.java

...oid/app/src/main/java/cx/ring/fragments/CallFragment.java

...oid/app/src/main/java/cx/ring/tv/call/TVCallFragment.java

...android/app/src/main/res/drawable/baseline_moderateur.xml

...ndroid/app/src/main/res/layout/item_participant_label.xml

ring-android/app/src/main/res/values/strings_call.xml

...ringclient/src/main/java/net/jami/call/CallPresenter.java

...nt/src/main/java/net/jami/facades/ConversationFacade.java

...ibringclient/src/main/java/net/jami/model/Conference.java

...ngclient/src/main/java/net/jami/services/CallService.java