Add failing, but ignored, test for Java string equality comparisons.

"Strings are strictly equal when they have the same sequence of
characters, same length, and same characters in corresponding
positions."

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Comparison_Operators

This should be true for Java strings as well.
I should read further down in the spec before committing my changes.

Two distinct objects are never equal for either strictly or abstract
comparisons.
https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Comparison_Operators