Update interfaces/permissions.idl (#22775)

Source: https://github.com/tidoust/reffy-reports/blob/5c53f34/ed/idl/permissions.idl
Build: https://travis-ci.org/tidoust/reffy-reports/builds/672386095
diff --git a/interfaces/permissions.idl b/interfaces/permissions.idl
index 9cde372..d45c7f9 100644
--- a/interfaces/permissions.idl
+++ b/interfaces/permissions.idl
@@ -46,6 +46,10 @@
   DOMString deviceId;
 };
 
+dictionary CameraDevicePermissionDescriptor : DevicePermissionDescriptor {
+  boolean panTiltZoom = false;
+};
+
 dictionary PermissionSetParameters {
   required PermissionDescriptor descriptor;
   required PermissionState state;