Auto hardware/interfaces/Android.bp

Bug: 31909444
Test: make various interfaces, mma -j
Change-Id: Ie2de39572e482415b5279110586a0cb7e5220c8e
diff --git a/Android.bp b/Android.bp
index 6dfde33..3cf3b3b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,3 +1,4 @@
+// This is an autogenerated file, do not edit.
 subdirs = [
     "benchmarks/msgq/1.0",
     "nfc/1.0",