Handle kernel launch calls

Bug: 23535985

Find rsParallelFor(void*, ...) calls in the .rs source code and
translate them into rsForEachInternal(int, rs_allocation, rs_allocation)
calls.

Semantic checks are pretty limited at this point. Will enhance them in followup CLs.

Change-Id: I6e2cf3db868f426aa8e0b9a77732b66c1e6b9f03
7 files changed