Move pipewire_common to src/

Since it will be used for video stuff too

configure.ac

@@ -2596,8 +2596,8 @@ PKG_CHECK_MODULES([PIPEWIRE], [libpipewire-0.3 >= 0.3.30], [found_pw_audio_deps=
 if test $pipewire_audio_req != no -a $found_pw_audio_deps = yes
 then
         pipewire_audio=yes
-        PIPEWIRE_ACAP_OBJS="src/audio/pipewire_common.o src/audio/capture/pipewire.o"
-        PIPEWIRE_APLAY_OBJS="src/audio/pipewire_common.o src/audio/playback/pipewire.o"
+        PIPEWIRE_ACAP_OBJS="src/pipewire_common.o src/audio/capture/pipewire.o"
+        PIPEWIRE_APLAY_OBJS="src/pipewire_common.o src/audio/playback/pipewire.o"
         add_module acap_pipewire "$PIPEWIRE_ACAP_OBJS" "$PIPEWIRE_LIBS"
         add_module aplay_pipewire "$PIPEWIRE_APLAY_OBJS" "$PIPEWIRE_LIBS"
 fi

src/audio/capture/pipewire.cpp

@@ -47,7 +47,7 @@
 
 #include "audio/audio_capture.h"
 #include "audio/types.h"
-#include "audio/pipewire_common.hpp"
+#include "pipewire_common.hpp"
 #include "debug.h"
 #include "lib_common.h"
 #include "utils/color_out.h"

src/audio/playback/pipewire.cpp

@@ -44,7 +44,7 @@
 
 #include "audio/audio_playback.h"
 #include "audio/types.h"
-#include "audio/pipewire_common.hpp"
+#include "pipewire_common.hpp"
 #include "debug.h"
 #include "lib_common.h"
 #include "utils/color_out.h"