Make unicode-width available to product and vendor

Bug: 270690570

Test: mma in external/rust/crates
Change-Id: I213bc0074c347af1b33a53ec4499b6765415c6d9
diff --git a/Android.bp b/Android.bp
index 3576a75..cec614d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -52,6 +52,8 @@
         "//apex_available:platform",
         "//apex_available:anyapex",
     ],
+    product_available: true,
+    vendor_available: true,
 }
 
 rust_test {