Make smallvec available to product and vendor

Bug: 270690570

Test: mma in external/rust/crates
Change-Id: I895c5f096990ced5ba69cd6c4338db14c1af81e7
diff --git a/Android.bp b/Android.bp
index d13eba1..5b9dc2f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -50,5 +50,7 @@
         "com.android.btservices",
         "com.android.virt",
     ],
+    product_available: true,
+    vendor_available: true,
     min_sdk_version: "29",
 }