updating header info, adding AVKit support, iOS support

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76933 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
common type for native rectangle

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76934 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775