xref-find-references can be improved

[huangfeiyu]

When I use xref-find-references to find the references of a java method, it set the default string to the string my cursor is in, that's awesome! However, when I press <enter> , it says "Unable to find symbol". check the following screen shot.

It works when I enter some characters and select the class name prefixed symbol from the list. Check the following screen shot

Thank you for your great work!

By the way the command lsp-find-references works perfectly.