b/21187932
Dependency from one kernel to another kernel -- where one reads the
other's output to a global allocation -- was not handled correctly.
This CL fixed that. Needed to make a new CTS test pass.
Change-Id: I500f9cac9d89bcaec7c186e942ba4a7d413daadb
And mark existing methods and builder deprecated.
Removed ScriptGroup2 class.
Renamed nested class UnboundValue to Input.
Marked classes Closure, Future, and Input as final.
Change-Id: I362910c115e9d0173dc515674e08bf4878232879