Merge "Rename StringNetworkSpecifier to Ethernet" am: 1c22944c5e am: 1f5508fb1f

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1574563

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib1fca0cf784120c4c0618901844a777e85bcd094