Remove isAtLeastR checks am: d0302b917e am: 9492e7b30a

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/3264750

Change-Id: I4a57511382f15a176398049d2ef36dd531553547
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>