Add bindgen bindings test

Note that this is currently a no-op test that does nothing.  But this
makes it future proof in case we add more later.

Test: atest
Change-Id: I23817febd2122f54c40958541fc66363d38b60ca

libstats/pull_rust/Android.bp

@@ -57,3 +57,13 @@ rust_library {
         "libstatspull_bindgen",
     ],
 }
+
+rust_test {
+    name: "libstatspull_bindgen_test",
+    srcs: [":libstatspull_bindgen"],
+    crate_name: "statspull_bindgen_test",
+    test_suites: ["general-tests"],
+    auto_gen_config: true,
+    clippy_lints: "none",
+    lints: "none",
+}