rename InterfaceMapUpdater to InterfaceMapHelper am: 9c82d9e693

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2925601

Change-Id: I851bfc67137869058de5d21e109e882dd8cd5ad7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>