Merge "Create the timerfd helper class" into main am: 38bbfa8c82

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3309935

Change-Id: I62f98cd6daacd59fb77330f9752a299e77d839ab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>