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

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

Change-Id: I311b744acaf80142dc663f319e0515b31217256a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>