Merge "Improve javadoc for Wi-Fi related policies" into tm-dev am: e51b62b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18374443



Change-Id: I57bd5ba768faab3f1cffd50c2f413ad2f5252ae1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>