cleanup: Make include macro usages consistent

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3157>

src/backends/meta-input-device.c

@@ -20,7 +20,7 @@
 #include "config.h"
 
 #include "backends/meta-backend-private.h"
-#include "meta-input-device-private.h"
+#include "backends/meta-input-device-private.h"
 
 typedef struct _MetaInputDevicePrivate MetaInputDevicePrivate;
 

src/backends/meta-input-mapper.c

@@ -21,10 +21,10 @@
 #include "config.h"
 
 #include "backends/meta-input-device-private.h"
-#include "meta-input-mapper-private.h"
-#include "meta-monitor-manager-private.h"
-#include "meta-logical-monitor.h"
-#include "meta-backend-private.h"
+#include "backends/meta-input-mapper-private.h"
+#include "backends/meta-monitor-manager-private.h"
+#include "backends/meta-logical-monitor.h"
+#include "backends/meta-backend-private.h"
 
 #include "meta-dbus-input-mapping.h"
 

src/backends/meta-monitor-manager-private.h

@@ -23,7 +23,7 @@
 
 #pragma once
 
-#include <cogl/cogl.h>
+#include "cogl/cogl.h"
 #include <graphene.h>
 
 #ifdef HAVE_GNOME_DESKTOP

src/backends/meta-stage-view.c

@@ -23,7 +23,7 @@
 
 #include "config.h"
 
-#include "meta-stage-view-private.h"
+#include "backends/meta-stage-view-private.h"
 
 typedef struct _MetaStageViewPrivate
 {

src/backends/native/meta-pointer-constraint-native.c

@@ -28,7 +28,7 @@
 #include <wayland-server.h>
 
 #include "core/meta-border.h"
-#include "meta-pointer-constraint-native.h"
+#include "backends/native/meta-pointer-constraint-native.h"
 
 struct _MetaPointerConstraintImplNative
 {