[FindMyMouse]Do not activate on game mode (#13990)

* [FindMyMouse] Do not activate on game mode

* Add settings scaffolding

* fix spellchecker

* Address PR comments

* Adress UI feedback

src/common/utils/game_mode.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <shellapi.h>
+
+inline bool detect_game_mode()
+{
+    QUERY_USER_NOTIFICATION_STATE notification_state;
+    if (SHQueryUserNotificationState(&notification_state) != S_OK)
+    {
+        return false;
+    }
+    return (notification_state == QUNS_RUNNING_D3D_FULL_SCREEN);
+}