Make futures-io available to product and vendor

Bug: 270690570

Test: mma in external/rust/crates
Change-Id: If5371862437f45193b170bd146f50fcb5ec4db1f
diff --git a/Android.bp b/Android.bp
index c01106f..2dc15cd 100644
--- a/Android.bp
+++ b/Android.bp
@@ -55,5 +55,7 @@
         "com.android.resolv",
         "com.android.virt",
     ],
+    product_available: true,
+    vendor_available: true,
     min_sdk_version: "29",
 }