build: Fix build after recent PipeWire header changes

PipeWire headers were recently cleaned up to reduce the number of
included headers. This leads to a number of functions and types not
being included when needed in wireplumber.

lib/wp/core.c

@@ -11,6 +11,7 @@
 #include "wpenums.h"
 
 #include <pipewire/pipewire.h>
+#include <spa/utils/result.h>
 
 /*
  * Integration between the PipeWire main loop and GMainLoop

lib/wp/monitor.c

@@ -7,6 +7,9 @@
  */
 
 #include <spa/monitor/device.h>
+#include <spa/pod/builder.h>
+#include <spa/pod/iter.h>
+#include <spa/utils/result.h>
 #include <pipewire/pipewire.h>
 
 #include "monitor.h"

lib/wp/proxy-node.c

@@ -10,6 +10,7 @@
 #include "error.h"
 
 #include <pipewire/pipewire.h>
+#include <spa/pod/builder.h>
 
 struct _WpProxyNode
 {

lib/wp/proxy-port.c

@@ -10,6 +10,8 @@
 #include "error.h"
 
 #include <pipewire/pipewire.h>
+#include <spa/pod/builder.h>
+#include <spa/pod/iter.h>
 
 struct _WpProxyPort
 {

modules/module-pipewire/audio-softdsp-endpoint/stream.c

@@ -9,6 +9,8 @@
 #include <spa/param/props.h>
 #include <pipewire/pipewire.h>
 #include <spa/debug/types.h>
+#include <spa/pod/builder.h>
+#include <spa/pod/iter.h>
 #include <spa/param/audio/type-info.h>
 
 #include "stream.h"

tests/wp/proxy.c

@@ -8,6 +8,7 @@
 
 #include <wp/wp.h>
 #include <pipewire/pipewire.h>
+#include <spa/pod/iter.h>
 
 #include "test-server.h"