Make which available to product and vendor

Bug: 270690570

Test: mma in external/rust/crates
Change-Id: I523a50d8511bd210a11a6c71231e933749575da4
diff --git a/Android.bp b/Android.bp
index e4167ea..22790af 100644
--- a/Android.bp
+++ b/Android.bp
@@ -35,4 +35,6 @@
         "//apex_available:platform",
         "//apex_available:anyapex",
     ],
+    product_available: true,
+    vendor_available: true,
 }