Merge "[NetworkPreferenceApp] Initial skeleton" am: 94e3f4ba8f am: e5473840c5

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1519808

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Icb939d063ea2f6f4c893ef2249e6cf38165418d8