Merge "[DK2]Add new SocketKeepalive.start to dynamically control keepalive" am: a31dc31b20 am: 168baa0338 am: 9799e35a4b

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2334604

Change-Id: Ib103d24d01641125d752936f686352ebcefaec83
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>