Proofreading fixes 0x04i Testing-User-Privacy-Protection.md (#2463)

* Edit of 0x04i-Testing-User-Privacy-Protection.md

This is an edit of the Mobile App User Privacy document by technical writer Rob Thornton. It tightens up the writing without significantly changing the document.

* Update 0x04i-Testing-User-Privacy-Protection.md

deleted "also"

* Update 0x04i-Testing-User-Privacy-Protection.md

corrected typo

* Apply suggestions from code review

* fix md lint error

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Co-authored-by: Carlos Holguera <perezholguera@gmail.com>