[automerger skipped] Fix leak of DhcpServer on tethering stop error am: c0fd05cf73 -s ours am: b7a7015e61 -s ours
am: 2f7e129f94 -s ours
am skip reason: change_id Ie73481e8d91ce43e4939f8c31a9ce431e382c6d9 with SHA1 fe1ad3d0b8 is in history

Change-Id: I6541d9eb8bc9fbef8d2e2c10018229ce17b64dc2