Merge "SettingsLib: Handle WifiService being null" into main am: f766981533 am: 362304d072 am: 56c8cb3876

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2892020

Change-Id: I5edb99a3dc52b7a68eed6bb424136d6805be781f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>