Merge "BpfRingBuf.h - implement isEmpty()" into main am: ca6cf094b9

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2824859

Change-Id: I2c99de701f2773b7f56dd0b8e8e0914edcc34365
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>