Update implementation of SetLanguageAndWindow method (#18816)

- In `Imm32InputMethod.cs`, removed the premature assignment to `_langId` within the `SetLanguageAndWindow` method to ensure subsequent logic correctly recognizes langId changes and properly updates the IME state.
- Fixed an issue where input controls initialized with `InputMethod.IsInputMethodEnable=false` could still use IME in their initial state.

src/Windows/Avalonia.Win32/Input/Imm32InputMethod.cs

@@ -84,9 +84,6 @@ namespace Avalonia.Win32.Input
         public void SetLanguageAndWindow(WindowImpl parent, IntPtr hwnd, IntPtr HKL)
         {
             Hwnd = hwnd;
-            _parent = parent;
-            _langId = PRIMARYLANGID(LGID(HKL));
-
             _parent = parent;
 
             var langId = PRIMARYLANGID(LGID(HKL));