Merge "Make downcast_rs vendor available." am: 239b44a9c4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/downcast-rs/+/1886956

Change-Id: I92fd3578f87bda5dfecf76e07d702d453eeef222
diff --git a/Android.bp b/Android.bp
index b197b8a..b716a25 100644
--- a/Android.bp
+++ b/Android.bp
@@ -102,6 +102,7 @@
 rust_library {
     name: "libdowncast_rs",
     host_supported: true,
+    vendor_available: true,
     crate_name: "downcast_rs",
     cargo_env_compat: true,
     cargo_pkg_version: "1.2.0",
diff --git a/cargo2android.json b/cargo2android.json
index 9a21b76..b8faecf 100644
--- a/cargo2android.json
+++ b/cargo2android.json
@@ -6,8 +6,9 @@
     "com.android.virt"
   ],
   "dependencies": true,
+  "vendor_available": true,
   "device": true,
   "min_sdk_version": "29",
   "run": true,
   "tests": true
-}
\ No newline at end of file
+}