24438 Roll buildroot to 47043991a50e1cfda66766009885197a05bb29f1 (affects: desktop, cla: yes, platform-windows)

24672 Convert cursor rect to device coordinates on Win32 (affects: desktop, cla: yes, platform-windows)

24699 Add RAII wrapper for Win32 IMM context (affects: desktop, affects: engine, cla: yes, platform-windows)

24770 Added dependency on CppWinRT for UWP builds (affects: desktop, cla: yes, platform-windows)

24801 Update cppwinrt to build 2.0.210304.5 (affects: desktop, cla: yes, platform-windows)