Update docs for removal of dalvik.vm.deadlock-predict.

I don't think any external developers have used this, so there's not
much risk of breaking a script.  The feature itself still exists, but
now you have to use the more general dalvik.vm.extra-opts property
to enable it.

Bug 2844083

Change-Id: Id4e1d8466e9b9e5818331ab1f40429040c49437b
1 file changed