introduce mapRetrieveLocklessRW() am: 0fff839ae6 am: e64933fecc

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3134554

Change-Id: I1640028d34405b70889cdddbd7954683eca8aace
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>