Add file contexts for com.android.neuralnetworks APEX package.

Test: -
Bug: 137320025
Change-Id: I13b3b86f8176a8fa3ce2ad8a625f991229d29ff9
diff --git a/apex/com.android.neuralnetworks-file_contexts b/apex/com.android.neuralnetworks-file_contexts
new file mode 100644
index 0000000..f6b21da
--- /dev/null
+++ b/apex/com.android.neuralnetworks-file_contexts
@@ -0,0 +1,2 @@
+(/.*)?                u:object_r:system_file:s0
+/lib(64)?(/.*)        u:object_r:system_lib_file:s0