DO NOT MERGE Avoid nullifying dhcp target

A race condition causes an NPE on mDhcpTarget. The safest change is
to avoid nullifying it. A dummy call to remove messages
on a handler whose looper is quit should do no harm.

Bug: 3191203
Change-Id: I7613a5add873ce9512e9719cb2dc8da61255370e
1 file changed
tree: 956e789db9c1c1eee15c6d5feade4017bb6c142e
  1. framework/