Add PreferenceControllers to Network page.

- Also made tiles refresh more efficient: when category changes, only
  refresh dynamic tiles. Static tiles from xml will not change due to
  category change.

Bug: 31799836
Test: RunSettingsRoboTests
Change-Id: I1e4c85f2c122c65ec99729e43a66c80acdd863c8

src/com/android/settings/network/MobileNetworkPreferenceController.java

@@ -0,0 +1,58 @@
+/*
+ * 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.network;
+
+import android.content.Context;
+import android.os.UserManager;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.Utils;
+import com.android.settings.core.PreferenceController;
+
+import static android.os.UserHandle.myUserId;
+import static android.os.UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS;
+import static com.android.settingslib.RestrictedLockUtils.hasBaseUserRestriction;
+
+public class MobileNetworkPreferenceController extends PreferenceController {
+
+    private static final String KEY_MOBILE_NETWORK_SETTINGS = "mobile_network_settings";
+
+    private final UserManager mUserManager;
+    private final boolean mIsSecondaryUser;
+
+    public MobileNetworkPreferenceController(Context context) {
+        super(context);
+        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+        mIsSecondaryUser = !mUserManager.isAdminUser();
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    protected boolean isAvailable() {
+        return mIsSecondaryUser
+                || Utils.isWifiOnly(mContext)
+                || hasBaseUserRestriction(mContext, DISALLOW_CONFIG_MOBILE_NETWORKS, myUserId());
+    }
+
+    @Override
+    protected String getPreferenceKey() {
+        return KEY_MOBILE_NETWORK_SETTINGS;
+    }
+}