increase timeout for focusing chrome (#12543)
Builds currently randomly fail due to being unable to focus chrome. I think this is due to the timeout being too early because:
- this only occurs on a single test: "Robot.chromeTests.checkbox labelled by inner element"
- Sometimes when the logging code happens to describe the fail of focus, chrome ends up being focused. Example:
Unable to focus Chrome.
Foreground Window: NVDA Browser Test Case (1950076191) - Google Chrome.
Open Windows: ['NVDA Browser Test Case (1950076191) - Google Chrome', 'AppVeyor Build Agent', 'Program Manager']
Description of how this pull request fixes the issue:
Increases the time and poll rate of the focusChome attempt
