[Keyboard Manager] Cleanup header file references to improve incremental build time (#4880)

* Remove WinUI include in KeyboardManagerState.h

* Changed include steps

* Clean up headers in KeyboardManagerUI except XamlBridge.h

* Cleaned up headers in KeyboardManager common and test

* Cleaned up headers in KeyboardManager project

* Removed headers from XamlBridge

* Removed some headers from kbm common pch

* Added MP flag to reduce build time

* Added missing include

src/modules/keyboardmanager/test/SingleKeyRemappingTests.cpp

@@ -4,6 +4,7 @@
 #include <keyboardmanager/common/KeyboardManagerState.h>
 #include <keyboardmanager/dll/KeyboardEventHandlers.h>
 #include "TestHelpers.h"
+#include "../common/shared_constants.h"
 
 using namespace Microsoft::VisualStudio::CppUnitTestFramework;