Merge "Move NetworkStackConstants to frameworks/libs/net" am: 2d26542b6a

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1455936

Change-Id: I9797cb5cd32261cf0ff5a16b6979b9177585855d
tree: f0318e36de2c4eace3713d202bc2bea435b075cd
  1. staticlibs/