Add base EconomyManager class.

Also link the class to the RESOURCE_ECONOMY system service.

Bug: 158300259
Test: Android builds
Change-Id: I2d203193fc0e14cbc0919b3f8a8e6b7fd5ce9225

apex/jobscheduler/framework/java/android/app/job/JobSchedulerFrameworkInitializer.java

@@ -19,6 +19,7 @@ package android.app.job;
 import android.annotation.SystemApi;
 import android.app.JobSchedulerImpl;
 import android.app.SystemServiceRegistry;
+import android.app.tare.EconomyManager;
 import android.content.Context;
 import android.os.DeviceIdleManager;
 import android.os.IDeviceIdleController;
@@ -56,5 +57,7 @@ public class JobSchedulerFrameworkInitializer {
         SystemServiceRegistry.registerContextAwareService(
                 Context.POWER_EXEMPTION_SERVICE, PowerExemptionManager.class,
                 PowerExemptionManager::new);
+        SystemServiceRegistry.registerStaticService(
+                Context.RESOURCE_ECONOMY_SERVICE, EconomyManager.class, EconomyManager::new);
     }
 }

apex/jobscheduler/framework/java/android/app/tare/EconomyManager.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2021 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.app.tare;
+
+import android.annotation.SystemService;
+import android.content.Context;
+
+/**
+ * Provides access to the resource economy service.
+ *
+ * @hide
+ */
+@SystemService(Context.RESOURCE_ECONOMY_SERVICE)
+public class EconomyManager {
+}