libcutils: create rust bindings for android ids

For work on the new rust based bpfloader, we need access to the IDs in
android_filesystem_config.h for owner/group permissions of pinned bpf
programs and maps. Create android_ids crate to expose this
information to rust.

Bug: 359646531
Test: Manual
Change-Id: Iee827d8a80a82fbee02a76280668071713625abf
Signed-off-by: Neill Kapron <nkapron@google.com>

libcutils/Android.bp

@@ -21,6 +21,17 @@ filegroup {
     srcs: ["include/private/android_filesystem_config.h"],
 }
 
+rust_bindgen {
+    name: "libandroid_ids",
+    crate_name: "android_ids",
+    source_stem: "bindings",
+    wrapper_src: "rust/aid_bindings.h",
+    header_libs: ["libcutils_headers"],
+    visibility: [
+        "//system/bpf/loader",
+    ],
+}
+
 cc_defaults {
     name: "libcutils_defaults",
     cflags: [

libcutils/rust/aid_bindings.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <private/android_filesystem_config.h>