BpfHandler.h - switch mStatsMapB from BpfMap to BpfMapRO am: eb9b6fad4e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/18992475

Change-Id: Idae795d27c93bb2fb4ab3f97308f83220f99a7b2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>