Make async-stream available to product and vendor

Bug: 270690570

Test: mma in external/rust/crates
Change-Id: Ic85ae156c3f2d12fa07255796ed89a365c248ef8
diff --git a/Android.bp b/Android.bp
index 48d1fb8..89089ff 100644
--- a/Android.bp
+++ b/Android.bp
@@ -87,4 +87,6 @@
         "//apex_available:platform",
         "//apex_available:anyapex",
     ],
+    product_available: true,
+    vendor_available: true,
 }