[automerger skipped] Check null NetworkSpecifier before redacting am: 4ad09c4a74 -s ours

am skip reason: Merged-In I5df3547995111fe6340facb94a577296d2228694 with SHA-1 144b6c742a is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/15121422

Change-Id: I7bcdf81fc5457fc697db496c4a04f70dc0801750