android/avrcp: Close AVRCP channel on error

This fixes resource leak.
diff --git a/android/avrcp.c b/android/avrcp.c
index 485b485..ef833df 100644
--- a/android/avrcp.c
+++ b/android/avrcp.c
@@ -248,13 +248,13 @@
 	rec = avrcp_record();
 	if (!rec) {
 		error("Failed to allocate AVRCP record");
-		return false;
+		goto fail;
 	}
 
 	if (bt_adapter_add_record(rec, 0) < 0) {
 		error("Failed to register AVRCP record");
 		sdp_record_free(rec);
-		return false;
+		goto fail;
 	}
 	record_id = rec->handle;
 
@@ -262,6 +262,12 @@
 						G_N_ELEMENTS(cmd_handlers));
 
 	return true;
+fail:
+	g_io_channel_shutdown(server, TRUE, NULL);
+	g_io_channel_unref(server);
+	server = NULL;
+
+	return false;
 }
 
 void bt_avrcp_unregister(void)