database: migrate to per account database

CMakeLists.txt

src/api/call.h

src/api/contact.h

src/api/contactmodel.h

src/api/interaction.h

src/api/lrc.h

src/api/newaccountmodel.h

src/api/newcallmodel.h

src/api/profile.h

src/authority/databasehelper.cpp

src/authority/storagehelper.cpp

src/authority/storagehelper.h

src/avmodel.cpp

src/callbackshandler.cpp

src/callbackshandler.h

src/contactmodel.cpp

src/conversationmodel.cpp

src/database.cpp

src/database.h

src/datatransfermodel.cpp