Make libbinderwrapper available in /vendor partition

Some modules in /vendor partition need to use this
library.

Bug: 77626538
Test: Build docs, test_suites_arm64, test_suites_x86_64
      in Android Things branch

Change-Id: Iec50a4dd9af7cd3b426e5d34d0dd1bf923ece627
diff --git a/libbinderwrapper/Android.bp b/libbinderwrapper/Android.bp
index 6fac0d8..d2487e2 100644
--- a/libbinderwrapper/Android.bp
+++ b/libbinderwrapper/Android.bp
@@ -38,6 +38,7 @@
 cc_library_shared {
     name: "libbinderwrapper",
     defaults: ["libbinderwrapper_defaults"],
+    vendor_available: true,
 
     srcs: [
         "binder_wrapper.cc",