[automerger skipped] Don't crash or wtf if the interface doesn't exist. am:...

[automerger skipped] Don't crash or wtf if the interface doesn't exist. am: 1725a2cd am: 3a9c1baf am: 96be0f51 -s ours

am skip reason: Change-Id I4f34343816202c996f9227b72d453ea4a464f4b8 with SHA-1 1725a2cd is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/11204388

Change-Id: Id3166525cdbd3ecc96a3fa33311886fcf97912ea