Make xml-rs available to product and vendor

Bug: 270690570

Test: mma in external/rust/crates
Change-Id: I75ae1b490b35367bee35ad05ee0b3184d406ce63
diff --git a/Android.bp b/Android.bp
index 35dfd9f..38ba911 100644
--- a/Android.bp
+++ b/Android.bp
@@ -32,6 +32,8 @@
         "//apex_available:platform",
         "com.android.virt",
     ],
+    product_available: true,
+    vendor_available: true,
 }
 
 rust_defaults {
@@ -94,4 +96,6 @@
     rustlibs: [
         "libxml_rust",
     ],
+    product_available: true,
+    vendor_available: true,
 }