ART: Special form of lock aliasing

Check whether the instruction immediately before a monitor-enter
is a move-object, establishing previously untracked lock aliasing
in a low-overhead manner.

Bug: 20102779
Bug: 21169615
Bug: 21988678
Bug: 23300986
Change-Id: Ia10d6219357e7bce29f58134637b07d3f4857b2f