Add search bar to SearchActivity.

Styling doesn't look exactly right yet but there's a bar.
Creates an ItemDecoration to add a spacer above the first view.

Removes the action bar and replaces it with a SearchView
inside of a CardView.

Remaining work: pixel pushing

Bug: 37477506
Test: make RunSettingsRoboTests
Change-Id: Ibf38c3c2725551bc4cd90e98d0020ec49c2eab2b
Merged-In: I4a0f0c91c51ff5820b61a596520d80a3337c3466

tests/robotests/src/com/android/settings/SettingsRobolectricTestRunner.java

@@ -93,6 +93,10 @@ public class SettingsRobolectricTestRunner extends RobolectricTestRunner {
                         getPackageName(),
                         Fs.fileFromPath("./frameworks/support/v7/appcompat/res"),
                         null));
+                paths.add(new ResourcePath(
+                        getPackageName(),
+                        Fs.fileFromPath("./frameworks/support/v7/cardview/res"),
+                        null));
                 return paths;
             }
         };

tests/robotests/src/com/android/settings/search2/HeaderDecoratorTest.java

@@ -0,0 +1,100 @@
+/*
+ * 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.search2;
+
+import android.app.LoaderManager;
+import android.content.Context;
+import android.content.Loader;
+import android.graphics.Rect;
+import android.os.Bundle;
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settings.search.IndexingCallback;
+import com.android.settings.testutils.FakeFeatureFactory;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.Robolectric;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.util.ActivityController;
+import org.robolectric.util.ReflectionHelpers;
+
+import java.util.List;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class HeaderDecoratorTest {
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private View mView;
+    @Mock
+    private RecyclerView mRecyclerView;
+    @Mock
+    private RecyclerView.LayoutParams mLayoutParams;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mView.getLayoutParams()).thenReturn(mLayoutParams);
+    }
+
+    @Test
+    public void testgetItemOffsets_positionZero_headerAdded() {
+        HeaderDecorator decorator = new HeaderDecorator();
+        Rect outRect = new Rect();
+        when(mRecyclerView.getChildAdapterPosition(any(View.class))).thenReturn(0);
+        when(mView.getContext().obtainStyledAttributes(any(int[].class))
+                .getDimensionPixelSize(0, 0)).thenReturn(20);
+        when(mView.getContext().getResources().getDimensionPixelSize(R.dimen.search_bar_margin))
+                .thenReturn(5);
+
+        decorator.getItemOffsets(outRect, mView, mRecyclerView, null);
+
+        assertThat(outRect).isEqualTo(new Rect(0, 30, 0, 0));
+    }
+
+    @Test
+    public void testgetItemOffsets_positionGreaterThanZero_noDecoration() {
+        HeaderDecorator decorator = new HeaderDecorator();
+        Rect outRect = new Rect();
+        when(mRecyclerView.getChildAdapterPosition(any(View.class))).thenReturn(1);
+
+        decorator.getItemOffsets(outRect, mView, mRecyclerView, null);
+
+        assertThat(outRect).isEqualTo(new Rect(0, 0, 0, 0));
+    }
+}