Merge "[Provider Model] Don't show Wi-Fi icon if the level is -1" into sc-qpr1-dev am: ebd9d182 am: d243cf50

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15759395

Change-Id: I8448bc4be36c1ae662e8dc2ca207973302e5cef0