Add file_contexts for "com.android.vndk" APEX

This new apex is a VNDK APEX which is going to replace /system/lib/vndk
libraries.

Bug: 134357236
Bug: 139772411
Test: m com.android.vndk

Change-Id: I9bdda5bc7862917a196b894cc562e0351db76c52
diff --git a/apex/com.android.vndk-file_contexts b/apex/com.android.vndk-file_contexts
new file mode 100644
index 0000000..f6b21da
--- /dev/null
+++ b/apex/com.android.vndk-file_contexts
@@ -0,0 +1,2 @@
+(/.*)?                u:object_r:system_file:s0
+/lib(64)?(/.*)        u:object_r:system_lib_file:s0