S- not to crash on NetworkInfo(null) or setDetailedState(null) am: dece0d805f am: 66bd87f0d4

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1892101

Change-Id: Iddb56ae95da59cfc9bc45b2f6139b1a578ad0c9d