common: Move settings to common from core.

- Removes a dependency on core and input_common from common.

src/core/hle/service/nifm/nifm.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/settings.h"
 #include "core/core.h"
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/k_event.h"
@@ -10,7 +11,6 @@
 #include "core/hle/service/nifm/nifm.h"
 #include "core/hle/service/service.h"
 #include "core/network/network.h"
-#include "core/settings.h"
 
 namespace Service::NIFM {