Add a task for deleting non required apps for device owner.

Use the already existing DeleteNonRequiredAppsFromManagedProfileTask.
Rename it and clean it up.

Change-Id: If792f746140bb6d606bb0d55f401766b8745085b
diff --git a/res/values/required_apps_managed_profile.xml b/res/values/required_apps_managed_profile.xml
new file mode 100644
index 0000000..863dda0
--- /dev/null
+++ b/res/values/required_apps_managed_profile.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/**
+ * Copyright (C) 2014 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.
+ */
+-->
+<resources>
+    <!-- A list of apps to be retained in the managed profile. -->
+    <string-array name="required_apps_managed_profile">
+        <item>com.android.development</item>
+    </string-array>
+</resources>