Merge "Ensure public methods are running on handler thread" am: 7e343d58ce am: 87d5d84cf0

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2584553

Change-Id: I718dee40563b4500f5266610d7618a5a40b38640
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>