Add support for the Browserstack api for app accessibility results

[denniebouman]

Is your feature request related to a problem? Please describe.
Add support for Browserstack api for app accessibility.
https://www.browserstack.com/docs/app-accessibility/api-reference/introduction

Describe the solution you'd like
Support the accessibility findings as reported from the mobile app accessibility testing from Browserstack. https://www.browserstack.com/app-accessibility-testing
As a first step we would like retrieve and display the count of issues per severity type.

Describe alternatives you've considered
Json result, but this seems like an internal format, not documented or versioned.

Additional context
Add any other context or screenshots about the feature request here.