Consolidate all wrappers used for testing.

- Add the wrapper package and move all wrappers to the wrapper package.
- Get rid of some wrapper interface/impl implementation and have a
wrapper class directly.

Bug: 65634579
Test: make RunSettingsRoboTests
Change-Id: Ic757d8f7bacfa7a034c7e692205bc1dc4b0e1de1

src/com/android/settings/wrapper/UserPackageWrapper.java

@@ -0,0 +1,29 @@
+/*
+ * 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.wrapper;
+
+import android.content.pm.PackageInfo;
+import android.content.pm.UserInfo;
+
+/**
+ * Wrapper class around android.webkit.UserPackage - to be able to use UserPackage in Robolectric
+ * tests (such tests currently don't support mocking hidden classes).
+ */
+public interface UserPackageWrapper {
+    UserInfo getUserInfo();
+    PackageInfo getPackageInfo();
+    boolean isEnabledPackage();
+    boolean isInstalledPackage();
+}