Add ArtModuleServiceManager.

This is to replace ServiceManager, which the ART module is currently
using to get the "artd" service.

Only the ART mainline module will be able to access an instance of this
class.

Bug: 233915142
Test: Presubmit
Change-Id: I94953bc7fbf471e142b1ab375fe1624bebd2a4ea

core/api/module-lib-current.txt

@@ -297,6 +297,14 @@ package android.net.netstats {
 
 package android.os {
 
+  public class ArtModuleServiceManager {
+    method @NonNull public android.os.ArtModuleServiceManager.ServiceRegisterer getArtdServiceRegisterer();
+  }
+
+  public static final class ArtModuleServiceManager.ServiceRegisterer {
+    method @Nullable public android.os.IBinder waitForService();
+  }
+
   public final class BatteryStatsManager {
     method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void reportNetworkInterfaceForTransports(@NonNull String, @NonNull int[]) throws java.lang.RuntimeException;
   }

core/java/android/os/ArtModuleServiceManager.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+package android.os;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+
+/**
+ * Provides a way to register and obtain the system service binder objects managed by the ART
+ * mainline module.
+ *
+ * Only the ART mainline module will be able to access an instance of this class.
+ *
+ * @hide
+ */
+@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+public class ArtModuleServiceManager {
+    /** @hide */
+    public ArtModuleServiceManager() {}
+
+    /** A class that exposes the method to obtain each system service. */
+    public static final class ServiceRegisterer {
+        @NonNull private final String mServiceName;
+
+        /** @hide */
+        public ServiceRegisterer(@NonNull String serviceName) {
+            mServiceName = serviceName;
+        }
+
+        /**
+         * Returns the service from the service manager.
+         *
+         * If the service is not running, servicemanager will attempt to start it, and this function
+         * will wait for it to be ready.
+         *
+         * @return {@code null} only if there are permission problems or fatal errors.
+         */
+        @Nullable
+        public IBinder waitForService() {
+            return ServiceManager.waitForService(mServiceName);
+        }
+    }
+
+    /** Returns {@link ServiceRegisterer} for the "artd" service. */
+    @NonNull
+    public ServiceRegisterer getArtdServiceRegisterer() {
+        return new ServiceRegisterer("artd");
+    }
+}

core/java/android/os/OWNERS

@@ -73,3 +73,6 @@ per-file Trace.java = file:/TRACE_OWNERS
 
 # PermissionEnforcer
 per-file PermissionEnforcer.java = tweek@google.com, brufino@google.com
+
+# ART
+per-file ArtModuleServiceManager.java = file:platform/art:/OWNERS