Adds support for multi-input kernels to Frameworks/Base/RS.

* Added a new JNI call to pass arrays of Allocations to the RS runtime.
* Added a new version of ForEach that takes an array of Allocations.
* Added some casts to disambiguate existing calls to forEach.

Change-Id: I46d2834c37075b2a2407fd8b010546818a4540d1
8 files changed