docs: Adjusted language to avoid gender-specific terminology. am: ad19ed2577 am: 2739d9f03a am: eadb008ea3 am: 3c0d8e0fdf

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12347127

Change-Id: I681d52cee0407badb65beb68f027188ec3486506