Issue #3038513 by voleger, andypost, Peter Majmesku, mohrerao, Berdir, Deepak Goyal, Raunak.singh, mistermoper, naresh_bavaskar, longwave, Hardik_Patel_12, Meenakshi.g, jungle: Replace drupal_valid_test_ua() and drupal_generate_test_ua() with static metho

...ds

Closes #3038513