Merge "Move wifi related hidden API flag file entries to packages/modules/Wifi" into sc-dev am: e39e5258 am: 54391b8f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15132973

Change-Id: Iff8f812f0280ea41e9381afa16027b04add44f72