Provide static libeffectsconfig for tests

VTS tests can only depend on NDK shared libraries,
as libeffectsconfig is not part of the NDK and is used
by audio tests, it must have a static version.

Bug: 78871270
Test: compile
Change-Id: I48fbffd0316efc151917071c54aa19e533c615df
Signed-off-by: Kevin Rocard <krocard@google.com>