Ignore Biweekly assertion errors

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -3561,6 +3561,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                 @Override
                 protected void onException(Bundle args, Throwable ex) {
+                    // https://github.com/mangstadt/biweekly/issues/121
+                    if (!(ex instanceof AssertionError))
                         Log.unexpectedError(parentFragment.getParentFragmentManager(), ex);
                 }
             }.setLog(false).execute(context, owner, args, "message:calendar");
@@ -3805,6 +3807,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                 @Override
                 protected void onException(Bundle args, Throwable ex) {
+                    if (!(ex instanceof AssertionError))
                         Log.unexpectedError(parentFragment.getParentFragmentManager(), ex);
                 }
             }.execute(context, owner, args, "message:participation");