Effects factory: Split runtime logic, parser and state

In order to support a new configuration format, the effect factory
config loading code is removed from the main file and stored
in its dedicated translation unit.

As the code was mutating the effect factory global variables,
those variables have been moved to a third file.

This patch only contains function move, not functional change.

Test: check this patch does not change the effect factory dump
Bug: 37492580
Change-Id: Ia625f0456fda94f1fb97a1a2fc3472ba529fb9ae
Signed-off-by: Kevin Rocard <krocard@google.com>