[BUGFIX] wdio-browserstack-service using the wrong session url when w3c properties are enforced

[tribecalledtest]

Proposed changes

With the webdriver upgrade to v7, W3C valid properties are enforced by default. This means we have to change app to appium:app when specifying capabilities for browserstack.

However, this change is not reflected in the actual wdio-browserstack-service, causing issues around updating sessions. Without this change, every update to the browserstack session will error with a 404 when only using appium':app property for capabilities

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

Reviewers: @webdriverio/project-committers

[christian-bromann]

Nice catch 👌