Merge "Always stop dhcp server even it is obsolete" am: 0ae446b50d am: 4f671f3834 am: 17cfe5d843 am: 9125d2ed58

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1370217

Change-Id: I434a17c5f41aed0b7f40cc5d23f6c6c0999d3fa5