Merge "Updating network preference comments" am: fa3f7a3366 am: 1def8c4eb2 am: 75f5d528f6 am: a9a9fbc5cd

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1490233

Change-Id: Ic1b025dd4598c211a3b9c5065e034b4cc001dc99