Regenerate Android.bp with new cargo2android.py

Test: make
Change-Id: I965af84af35306644122d5eabeef95cef4c87ee0
diff --git a/Android.bp b/Android.bp
index d75dab1..5faa928 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,7 +1,8 @@
-// This file is generated by cargo2android.py --run --device.
+// This file is generated by cargo2android.py --run --device --dependencies.
 
 rust_library {
     name: "libbitflags",
+    // has rustc warnings
     host_supported: true,
     crate_name: "bitflags",
     srcs: ["src/lib.rs"],