Add admin-set default apps to Enterprise Privacy Settings page

This CL adds information about the number of default handlers for
common intents (e.g. browser, e-mail, calendar) set by the admin.

Bug: 32692748
Test: make RunSettingsRoboTests

Change-Id: I569d9ddabeee2b2aa9a892b28066abb8bf920fcf

src/com/android/settings/applications/IPackageManagerWrapper.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2017 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.settings.applications;
+
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.os.RemoteException;
+
+/**
+ * This interface replicates a subset of the android.content.pm.IPackageManager (PMS). The interface
+ * exists so that we can use a thin wrapper around the PMS in production code and a mock in tests.
+ * We cannot directly mock or shadow the PMS, because some of the methods we rely on are newer than
+ * the API version supported by Robolectric.
+ */
+public interface IPackageManagerWrapper {
+
+    /**
+     * Calls {@code IPackageManager.checkUidPermission()}.
+     *
+     * @see android.content.pm.IPackageManager#checkUidPermission
+     */
+    int checkUidPermission(String permName, int uid) throws RemoteException;
+
+    /**
+     * Calls {@code IPackageManager.findPersistentPreferredActivity()}.
+     *
+     * @see android.content.pm.IPackageManager#findPersistentPreferredActivity
+     */
+    ResolveInfo findPersistentPreferredActivity(Intent intent, int userId) throws RemoteException;
+}