conversation: add signal for profile updates

bin/dbus/cx.ring.Ring.ConfigurationManager.xml

bin/dbus/dbusclient.cpp

bin/jni/conversation.i

bin/jni/jni_interface.i

bin/nodejs/callback.h

bin/nodejs/conversation.i

bin/nodejs/nodejs_interface.i

src/client/ring_signal.cpp

src/jami/conversation_interface.h

src/jamidht/conversation.cpp

src/jamidht/conversationrepository.cpp

src/jamidht/conversationrepository.h

test/unitTest/conversation/conversation.cpp