Use new Google Utility for detecting whether to support background URL session uploads

[harlanhaskins]

This adopts a new GoogleUtilities API I am adding here: google/GoogleUtilities#220

This will properly force App Clips to fall back to foreground uploads, since background uploads are not supported. Essentially, this expands the heuristic that was previously looking for app extensions.

Fixes #14793

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[harlanhaskins]

cc @aerickson14 who hit this specific issue in his App Clip

[ncooke3]

Thanks for bumping the dependency versions!

[harlanhaskins]

It seems that crashlytics test might be flaky...

[paulb777]

LGTM with a Changelog update.

[ncooke3]

Thanks!