Add test for "Open page with ampersand in title caused network issues"

The code change is in the MW Java API.
Make sure you do a mvn install on it once it's merged.

Bug: 66152
Change-Id: Id72f1fc74a0e8c05676035a7453a76f55901a6a0
Merge "Add test for "Open page with ampersand in title caused network issues""