internal/pipewire: export Registry::Destroy

This handles the error returned by Sync.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pipewire/pipewire_test.go

@@ -870,6 +870,11 @@ func TestContextErrors(t *testing.T) {
 		}, "new Registry::Global event for PipeWire:Interface:NewInvalid stepping on previous id 2989 for PipeWire:Interface:Invalid"},
 
 		{"UnknownGlobalIDRemoveError", pipewire.UnknownGlobalIDRemoveError(0xbad), "Registry::GlobalRemove event targets unknown id 2989"},
+
+		{"PermissionError", &pipewire.PermissionError{
+			ID:      2,
+			Message: "no permission to destroy 0",
+		}, "no permission to destroy 0"},
 	}
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {