Merge "Test conntrack event monitor on R" am: d5f07c1243 am: 4c9bfb1fbd am: 9788c4a2e6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1639707

Change-Id: Iff25e4df195abb02ca8e7b94decaaa404f742652