[automerger skipped] Replace ArrayList with a CopyOnWriteArrayList am:...

[automerger skipped] Replace ArrayList with a CopyOnWriteArrayList am: 9b2ffb6a -s ours am: df25bea7 -s ours

am skip reason: Change-Id I3914e9ddc05e37d4deaa8846d7c3ba742160a788 with SHA-1 4854c717 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/12270751

Change-Id: If8ff3526456d9cceca758f4892c351d35b11e5ff