Bug 1857121: Update IA2TypeLibrary.idl to latest revision (IAccessible2 repo commit 4461630f). r=morgan

Most importantly, this removes the reference to the IAccessible2_3 interface, which is now deprecated and thus missing from the IDL we build in accessible/interfaces/ia2/IA2Typelib.idl.
This was causing MinGW builds to fail, though strangely, Microsoft's midl tool doesn't seem to care.

Differential Revision: https://phabricator.services.mozilla.com/D190416

other-licenses/ia2/IA2TypeLibrary.idl

@@ -71,7 +71,6 @@ library IAccessible2Lib
     importlib ("oleacc.dll");
     interface IAccessible2;
     interface IAccessible2_2;
-    interface IAccessible2_3;
     interface IAccessibleAction;
     interface IAccessibleApplication;
     interface IAccessibleComponent;
@@ -87,6 +86,7 @@ library IAccessible2Lib
     interface IAccessibleTableCell;
     interface IAccessibleText;
     interface IAccessibleText2;
+    interface IAccessibleTextSelectionContainer;
     interface IAccessibleValue;
     enum IA2CoordinateType;
     enum IA2EventID;