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

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

Change-Id: I7c8cb44cc27287d2ad7fcb45940b95c6b02c9dfc