Make PackageInstaller able to receive app installed broadcast

Now system will send an explicit new app installed broadcast
to PackageInstaller.

Bug: 111214100
Test: Able to receive broadcast when new app is installed
Change-Id: I0242f992fd06cc148554bc46d6119c897e03432c

packages/PackageInstaller/AndroidManifest.xml

@@ -106,6 +106,14 @@
             </intent-filter>
         </receiver>
 
+        <receiver android:name=".PackageInstalledReceiver"
+                android:exported="true">
+            <intent-filter android:priority="1">
+                <action android:name="android.intent.action.PACKAGE_ADDED" />
+                <data android:scheme="package" />
+            </intent-filter>
+        </receiver>
+
         <activity android:name=".UninstallUninstalling"
             android:excludeFromRecents="true"
             android:exported="false" />

packages/PackageInstaller/src/com/android/packageinstaller/PackageInstalledReceiver.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 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.packageinstaller;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+/**
+ * Receive new app installed broadcast and notify user new app installed.
+ */
+public class PackageInstalledReceiver extends BroadcastReceiver {
+
+    private static final String TAG = "PackageInstalledReceiver";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        // TODO: Add logic to handle new app installed.
+    }
+}

services/core/java/com/android/server/pm/PackageManagerService.java

@@ -1988,6 +1988,14 @@ public class PackageManagerService extends IPackageManager.Stub
                             mRequiredVerifierPackage, null /*finishedReceiver*/,
                             updateUserIds, instantUserIds);
                 }
+                // If package installer is defined, notify package installer about new
+                // app installed
+                if (mRequiredInstallerPackage != null) {
+                    sendPackageBroadcast(Intent.ACTION_PACKAGE_ADDED, packageName,
+                            extras, Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND /*flags*/,
+                            mRequiredInstallerPackage, null /*finishedReceiver*/,
+                            firstUserIds, instantUserIds);
+                }
 
                 // Send replaced for users that don't see the package for the first time
                 if (update) {