WidgetDriver: Add io.element.call.encryption_keys to-device capability.

This needs to be part of the send/read capabilities so that to-device keys can be used.

Author: toger5

bindings/matrix-sdk-ffi/src/widget.rs

@@ -321,7 +321,11 @@ pub fn get_element_call_required_permissions(
             event_type: "org.matrix.rageshake_request".to_owned(),
         },
         // To read and send encryption keys
+        WidgetEventFilter::ToDeviceWithType {
+            event_type: "io.element.call.encryption_keys".to_owned(),
+        },
         // TODO change this to the appropriate to-device version once ready
+        // remove this once all matrixRTC call apps supports to-device encryption.
         WidgetEventFilter::MessageLikeWithType {
             event_type: "io.element.call.encryption_keys".to_owned(),
         },