Add local service interface for app hibernation

Adds a local service interface for app hibernation service that lets
other system services in system server call into app hibernation service
directly.

Bug: 175829330
Test: builds
Change-Id: Iad830fa1f380c741674ef257db9d8d7830be6592

services/core/java/com/android/server/apphibernation/AppHibernationManagerInternal.java

@@ -0,0 +1,46 @@
+/*
+ * 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 com.android.server.apphibernation;
+
+/**
+ * App hibernation manager local system service interface.
+ *
+ * @hide Only for use within the system server.
+ */
+public abstract class AppHibernationManagerInternal {
+
+    /**
+     * @see AppHibernationService#isHibernatingForUser
+     */
+    public abstract boolean isHibernatingForUser(String packageName, int userId);
+
+    /**
+     * @see AppHibernationService#setHibernatingForUser
+     */
+    public abstract void setHibernatingForUser(String packageName, int userId,
+            boolean isHibernating);
+
+    /**
+     * @see AppHibernationService#isHibernatingGlobally
+     */
+    public abstract boolean isHibernatingGlobally(String packageName);
+
+    /**
+     * @see AppHibernationService#setHibernatingGlobally
+     */
+    public abstract void setHibernatingGlobally(String packageName, boolean isHibernating);
+}

services/core/java/com/android/server/apphibernation/AppHibernationService.java

@@ -59,6 +59,7 @@ import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.DumpUtils;
 import com.android.internal.util.IndentingPrintWriter;
+import com.android.server.LocalServices;
 import com.android.server.SystemService;
 
 import java.io.File;
@@ -134,6 +135,8 @@ public final class AppHibernationService extends SystemService {
         intentFilter.addAction(ACTION_PACKAGE_REMOVED);
         intentFilter.addDataScheme("package");
         userAllContext.registerReceiver(mBroadcastReceiver, intentFilter);
+
+        LocalServices.addService(AppHibernationManagerInternal.class, mLocalService);
     }
 
     @Override
@@ -545,6 +548,36 @@ public final class AppHibernationService extends SystemService {
         }
     }
 
+    private final AppHibernationManagerInternal mLocalService = new LocalService(this);
+
+    private static final class LocalService extends AppHibernationManagerInternal {
+        private final AppHibernationService mService;
+
+        LocalService(AppHibernationService service) {
+            mService = service;
+        }
+
+        @Override
+        public boolean isHibernatingForUser(String packageName, int userId) {
+            return mService.isHibernatingForUser(packageName, userId);
+        }
+
+        @Override
+        public void setHibernatingForUser(String packageName, int userId, boolean isHibernating) {
+            mService.setHibernatingForUser(packageName, userId, isHibernating);
+        }
+
+        @Override
+        public void setHibernatingGlobally(String packageName, boolean isHibernating) {
+            mService.setHibernatingGlobally(packageName, isHibernating);
+        }
+
+        @Override
+        public boolean isHibernatingGlobally(String packageName) {
+            return mService.isHibernatingGlobally(packageName);
+        }
+    }
+
     private final AppHibernationServiceStub mServiceStub = new AppHibernationServiceStub(this);
 
     static final class AppHibernationServiceStub extends IAppHibernationService.Stub {