internal/pipewire: implement Registry::GlobalRemove

This is emitted by PipeWire when a global object disappears, because PipeWire insists that all clients that had called Core::GetRegistry must constantly sync its local registry state with the remote.

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

internal/pipewire/pipewire_test.go

@@ -862,6 +862,14 @@ func TestContextErrors(t *testing.T) {
 			ID:       0xbad,
 			Sequence: 0xcafe,
 		}, "received Core::Ping seq 51966 targeting unknown proxy id 2989"},
+
+		{"GlobalIDCollisionError", &pipewire.GlobalIDCollisionError{
+			ID:       0xbad,
+			Previous: &pipewire.RegistryGlobal{Type: "PipeWire:Interface:Invalid"},
+			Current:  &pipewire.RegistryGlobal{Type: "PipeWire:Interface:NewInvalid"},
+		}, "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"},
 	}
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {