[REACTOS] Standardize <imm.h> and <immdev.h> (#6493)

Improve header compatibility and
code quality.
JIRA issue: CORE-19268
- Improve <imm.h> and <immdev.h>
  compatibility by correctly choosing
  the items.
- Use <immdev.h> instead of
  <ddk/immdev.h>.
- Move INPUTCONTEXTDX, IMEINFOEX,
  IMEDPI, and CLIENTIMC into
  <imm32_undoc.h>.
- Adapt to these changes.

modules/rostests/apitests/imm32/precomp.h

@@ -4,13 +4,13 @@
 #define WIN32_NO_STATUS
 #include <windows.h>
 #include <imm.h>
-#include <ddk/immdev.h>
+#include <immdev.h>
+#include <imm32_undoc.h>
 #include <pseh/pseh2.h>
 #include <ndk/umtypes.h>
 #include <ndk/pstypes.h>
 #include "../../../win32ss/include/ntuser.h"
 #include <undocuser.h>
-#include <imm32_undoc.h>
 #include <ndk/rtlfuncs.h>
 #include <wine/test.h>
 #include <stdio.h>

modules/rostests/apitests/win32nt/win32nt.h

@@ -14,6 +14,8 @@
 #include <wingdi.h>
 #include <objbase.h>
 #include <imm.h>
+#include <immdev.h>
+#include <imm32_undoc.h>
 
 #include <winddi.h>
 #include <prntfont.h>