Populate Enterprise Privacy Settings page - batch 1

This CL adds the first batch of items to the Privacy Settings page.
These are all the items that fall into the "What types of
information can your organization see?" category and do not require
deeper Framework changes. Further batches are to come in separate
CLs.

Test: make RunSettingsRoboTests
Bug: 32692748
Change-Id: I460093bc45ed0e5baab2a5cdf9833e654d436cc9

src/com/android/settings/enterprise/InstalledPackagesPreferenceController.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016 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.enterprise;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.applications.ApplicationFeatureProvider;
+import com.android.settings.core.PreferenceController;
+import com.android.settings.overlay.FeatureFactory;
+
+public class InstalledPackagesPreferenceController extends PreferenceController {
+
+    private static final String KEY_NUMBER_INSTALLED_PACKAGES = "number_installed_packages";
+    private final ApplicationFeatureProvider mFeatureProvider;
+
+    public InstalledPackagesPreferenceController(Context context) {
+        super(context);
+        mFeatureProvider = FeatureFactory.getFactory(context)
+                .getApplicationFeatureProvider(context);
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        mFeatureProvider.calculateNumberOfInstalledApps(
+                new ApplicationFeatureProvider.NumberOfInstalledAppsCallback() {
+                    @Override
+                    public void onNumberOfInstalledAppsResult(int num) {
+                        preference.setTitle(mContext.getResources().getQuantityString(
+                                R.plurals.number_installed_packages, num, num));
+                    }
+                });
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_NUMBER_INSTALLED_PACKAGES;
+    }
+}