Add new llndk library, libneuralnetworks_shim.so

libneuralnetworks_shim.so allows vendor service to run
a NNAPI Driver sAIDL service backed by a NNAPI SL Driver.
SL Driver is a shared library with a known stable C API,
that contains vendor driver implementation.

libneuralnetworks_shim.so is part of com.android.neuralnetworks
APEX package.

Test: run VTS driver sample backed by shim on CF
Bug: 172925288
Change-Id: Ibbb0af00377a2ade212740b61158274a6942be9d
diff --git a/target/product/gsi/current.txt b/target/product/gsi/current.txt
index c753e6c..550ae7c 100644
--- a/target/product/gsi/current.txt
+++ b/target/product/gsi/current.txt
@@ -14,6 +14,7 @@
 LLNDK: libmediandk.so
 LLNDK: libnativewindow.so
 LLNDK: libneuralnetworks.so
+LLNDK: libneuralnetworks_shim.so
 LLNDK: libselinux.so
 LLNDK: libsync.so
 LLNDK: libvndksupport.so