BpfRingbuf.h - use exclusively locked map am: fbaa3c9890 am: 29d8156f7b

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

Change-Id: Ied983445e72daca5b894e66b3913ffecd3fb2088
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>