Merge "Add MANAGE_TEST_NETWORKS to system API" am: 2a0f125d7d am: 6c75038336

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1552176

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ie9103e40a248ef3bbdd0f758aebe0b5e21e4372c