[automerger skipped] [nearby] Update README to add build env script am: a3eb71b633 am: 2408fda2a8 am: f1f8de49b1 -s ours

am skip reason: Merged-In I43257c79d212ed24fb0cd69f363b25bceb098f01 with SHA-1 85afaab1ac is already in history

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2871060

Change-Id: I8ae89f0a83ec93c57245394a286bb52c2a3c57bc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>