Merge "Have a collection of utilities for netd - NetdUtils" am: b062f94b3b am: 91664e9d5c am: 711004fbc9

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1535641

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I6540ea4bcc037bbc939273a990b6915568857559