Manage data plans settings preference.

Change-Id: I4e15921e793c8c336325e14bec8638d5f71dae17
Note: These changes are required for Data balance UI.
Bug: 62349208
Test: make RunSettingsRoboTests -j40

res/layout/manage_data_plans_preference.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     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.
+-->
+
+<FrameLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingStart="@dimen/preference_no_icon_padding_start"
+        android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+        android:paddingTop="8dp"
+        android:paddingBottom="16dp">
+    <Button
+            android:id="@+id/manage_data_plans"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/data_plan_usage_manage_plans_button_text"
+            android:textAllCaps="true"
+            style="@style/AppActionPrimaryButton" />
+</FrameLayout>

res/values/strings.xml

@@ -5526,6 +5526,9 @@
     <!--  action to select all [CHAR LIMIT=30] -->
     <string name="select_all">Select all</string>
 
+    <!-- A button that gets displayed in data plan usage preference in settings page to manage data plans [CHAR LIMIT=25] -->
+    <string name="data_plan_usage_manage_plans_button_text">Manage plans</string>
+
     <!-- Activity title for network data usage summary. [CHAR LIMIT=25] -->
     <string name="data_usage_summary_title">Data usage</string>
     <!-- Activity title for Appk data usage summary. [CHAR LIMIT=25] -->

tests/robotests/src/com/android/settings/datausage/ManageDataPlansPreferenceTest.java

@@ -0,0 +1,62 @@
+/*
+ * 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.datausage;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.Button;
+import android.widget.LinearLayout;
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public final class ManageDataPlansPreferenceTest {
+    private Preference mPreference;
+    private PreferenceViewHolder mHolder;
+    private Context mContext;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mPreference = new Preference(mContext);
+        mPreference.setLayoutResource(R.layout.manage_data_plans_preference);
+        LayoutInflater inflater = LayoutInflater.from(mContext);
+        View view = inflater.inflate(mPreference.getLayoutResource(),
+                new LinearLayout(mContext), false);
+        mHolder = PreferenceViewHolder.createInstanceForTests(view);
+    }
+
+    @Test
+    public void shouldRender_withData() {
+        mPreference.onBindViewHolder(mHolder);
+        Button managePlanButton = (Button) mHolder.findViewById(R.id.manage_data_plans);
+        assertThat(managePlanButton.getText())
+                .isEqualTo(mContext.getString(R.string.data_plan_usage_manage_plans_button_text));
+    }
+}