Merge "Make the IP subnet persistent till reboot" am: f052e40f79 am: 18b5773041 am: 4b52fef91d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1432958

Change-Id: I6d76e970384a3021e1fe519a268627628f45d446
tree: 379478664b97534977866f6aac3d0a24f20b7672
  1. Tethering/