Merge "Memory leak due to no stop for IpNeighborMonitor." am: 10b6226702

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1343440

Change-Id: I8723fa07bdbf067940d1fa0b27b13cd5e39289f6

packages/Tethering/src/android/net/ip/IpServer.java

@@ -1321,6 +1321,7 @@ public class IpServer extends StateMachine {
     class UnavailableState extends State {
         @Override
         public void enter() {
+            mIpNeighborMonitor.stop();
             mLastError = TetheringManager.TETHER_ERROR_NO_ERROR;
             sendInterfaceState(STATE_UNAVAILABLE);
         }