Allow building for device. am: 1f112548fc am: 5550ea3ee3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-io/+/1332156

Change-Id: I2264d5d57dbf4c12df374884be2c3a5c05ee0711
diff --git a/Android.bp b/Android.bp
index 7e8ccdd..7de3fc5 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,7 +1,8 @@
-// This file is generated by cargo2android.py.
+// This file is generated by cargo2android.py --run --device.
 
-rust_library_host_rlib {
+rust_library_rlib {
     name: "libfutures_io",
+    host_supported: true,
     crate_name: "futures_io",
     srcs: ["src/lib.rs"],
     edition: "2018",