Adjust visibility for nnapi module.

This work is in preparation for migration to
packages/modules/NeuralNetworks.

BUG: 167961889
Test: TH
Merged-In: Iab6550eb407d00f59774c07d74e43fce81d265f4
Change-Id: Iab6550eb407d00f59774c07d74e43fce81d265f4
Exempt-From-Owner-Approval: Already approved in original CL in aosp/master
diff --git a/Android.bp b/Android.bp
index 6ff1bf8..a715658 100644
--- a/Android.bp
+++ b/Android.bp
@@ -238,6 +238,7 @@
         "//hardware/interfaces/keymaster/4.0/vts/functional",
         "//hardware/interfaces/keymaster/4.1/vts/functional",
         "//packages/modules/DnsResolver/tests:__subpackages__",
+        "//packages/modules/NeuralNetworks:__subpackages__",
         "//system/core/adb",
         "//system/core/init",
         "//system/core/fs_mgr/liblp",