BpfRingbuf.h - use exclusively locked map am: fbaa3c9890

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3134555

Change-Id: Id656098cce8011a54de1845f4af559ca450a1aaa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>