[Wifi] Update language to comply with Android’s inclusive language guidance

Global replacement with "placeholder"

See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 161896447
Test: atest com.android.server.wifi
Change-Id: Ic995c3dd1356a53949a98338a10ce710fc686a18
17 files changed
tree: 1ca8a2a3bf5d59f53311364617fcd366bf211585
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg