Move definition of configureRpcThreadpool.

Functions in headers should only depend on functions that you are
exporting. Otherwise, modules must link against dependencies of this
module.

Test: binderized marlin boots and works

Merged-In: If252dc517d37af8d3621f06d04c89361c4ae8df6
Change-Id: If252dc517d37af8d3621f06d04c89361c4ae8df6
2 files changed