Add vendor_available: true to Android.bp.

Bug: 78570710
Test: Still builds.
Change-Id: I4a8e58b56e5eb26788d3bcb4e51fbe876bdc04cc
diff --git a/Android.bp b/Android.bp
index 24df14d..313f7a6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -75,6 +75,7 @@
 // Build wayland_client
 cc_library_static {
     name: "libwayland_client",
+    vendor_available: true,
     defaults: ["wayland_defaults"],
     srcs: [
        "src/connection.c",