Update Android.bp to reflect aosp/2763825

Test: Ran cargo2android. Treehugger.
Change-Id: Ibeb4cae02cf6982928c5cfe73e82f8c10fbb6d3c
diff --git a/Android.bp b/Android.bp
index 52a5a15..1cb9448 100644
--- a/Android.bp
+++ b/Android.bp
@@ -52,6 +52,4 @@
         "libproc_macro2",
     ],
     compile_multilib: "first",
-    product_available: true,
-    vendor_available: true,
 }