Add a link from runtime ns to the neuralnetworks ns

libneuralnetworks.so could be preloaded. In that case, it should be
accessible from libnativeloader which runs in the runtime namespace.

Bug: 141847343
Test: m, device boots
Change-Id: Ie1e17a433fb64cc31d1bbc7fa8945fa36c82aea8
diff --git a/contents/namespace/runtime.cc b/contents/namespace/runtime.cc
index 493c288..3ec93ab 100644
--- a/contents/namespace/runtime.cc
+++ b/contents/namespace/runtime.cc
@@ -31,6 +31,8 @@
   // library when it exists.
   ns.CreateLink(ctx.IsVendorSection() ? "system" : "default", true);
 
+  ns.CreateLink("neuralnetworks").AddSharedLib("libneuralnetworks.so");
+
   return ns;
 }
 }  // namespace contents