fix variable name
cmake: fix non-matching ENDIF()
[ #60972 ] Move audio related classes to a new namespace
[ #60972 ] Port all Audio related classes to D-Pointer
[ #60972 ] Port CallModel class to D-Pointer
[ #60972 ] Port ContactModel and ContactProxyModel classes to D-Pointer
[ #60972 ] Port HistoryModel class to D-Pointer