rust: Visibility exports for bindgen

We are now default restricting bindgen visibility to subpackages. This
change is part of a set of changes adding explicit visibility for
bindgen libraries which are already being used elsewhere.

* If these visibility rules are to allow access by the safe bindings
  library which lives elsewhere in the codebase, no action is needed.
* If safe bindings do not exist, and you own this library, now is a good
  time to think about producing them and transitioning your (now
  enumerated) client list.
* If safe bindings exist, but there is a surprise client of the raw
  bindings on this list, now is a good time to talk to them about why
  they don't want to use your safe bindings.

Bug: 166332519
Test: m
Change-Id: I1320a72d61cf0d760da3e037dec6ad35c8c979f8
diff --git a/libstats/pull_rust/Android.bp b/libstats/pull_rust/Android.bp
index 4ffa98d..a3ef131 100644
--- a/libstats/pull_rust/Android.bp
+++ b/libstats/pull_rust/Android.bp
@@ -22,6 +22,10 @@
     name: "libstatspull_bindgen",
     wrapper_src: "statslog.h",
     crate_name: "statspull_bindgen",
+    visibility: [
+        "//frameworks/proto_logging/stats/stats_log_api_gen",
+        "//packages/modules/Virtualization/libs/statslog_virtualization",
+    ],
     source_stem: "bindings",
     bindgen_flags: [
         "--size_t-is-usize",
@@ -48,7 +52,7 @@
     apex_available: [
         "//apex_available:platform",
         "com.android.virt",
-    ]
+    ],
 }
 
 rust_library {