Use standard preference layout for wallpaper picker

Change-Id: I7c76a9af5e64af4ac8641227289a94ab00f923f2
Fix: 37351626
Test: visual

tests/unit/src/com/android/settings/WallpaperPreferenceLayoutTest.java

@@ -1,34 +0,0 @@
-/*
- * 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;
-
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.view.LayoutInflater;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-@SmallTest
-@RunWith(AndroidJUnit4.class)
-public class WallpaperPreferenceLayoutTest {
-    @Test
-    public void testInflateWallpaperPreferenceLayout_doesNotCrash() {
-      LayoutInflater.from(InstrumentationRegistry.getTargetContext())
-          .inflate(R.layout.preference_wallpaper_type, null, false);
-    }
-}