Merge "Move network activity change processing to handler thread" am: df9a2d7e20 am: b3f309ca24

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2606673

Change-Id: Icdf7ab57f0db4834cf157aeb925616cfe5c1014a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>