callView: add mediahandler preferences

jami-qt.pro

qml.qrc

src/commoncomponents/PreferenceItemDelegate.qml

src/commoncomponents/SettingParaCombobox.qml

src/mainapplication.cpp

src/mainview/components/MediaHandlerItemDelegate.qml

src/mainview/components/MediaHandlerPicker.qml

src/mediahandleradapter.cpp

src/mediahandleradapter.h

src/mediahandleritemlistmodel.cpp

src/mediahandleritemlistmodel.h

src/mediahandlerlistpreferencemodel.cpp

src/mediahandlerlistpreferencemodel.h

src/preferenceitemlistmodel.cpp

src/preferenceitemlistmodel.h

src/settingsview/components/PluginItemDelegate.qml