SearchView keyboard opens and closes appropriately

- Keyboard opens when Search View opens
- Keyboard closes on query text submit
- Keyboard closes when user scrolls through results

Change-Id: I7cef383a2799eeb456fbaa07b8577c88cd35a997
Fixes: 34723251, 35164545
Test: SearchFragmentEspressoTest, manual test requested from QA

tests/app/src/com/android/settings/search2/SearchFragmentEspressoTest.java

@@ -0,0 +1,49 @@
+/*
+ * 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.support.test.filters.SmallTest;
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+import android.widget.SearchView;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.matcher.ViewMatchers.hasFocus;
+import static android.support.test.espresso.matcher.ViewMatchers.withClassName;
+import static android.support.test.espresso.matcher.ViewMatchers.withTagKey;
+import static android.support.test.espresso.assertion.ViewAssertions.matches;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.core.AllOf.allOf;
+
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class SearchFragmentEspressoTest {
+    @Rule
+    public ActivityTestRule<SearchActivity> mActivityRule =
+            new ActivityTestRule<>(SearchActivity.class, true, true);
+
+    @Test
+    public void test_OpenKeyboardOnSearchLaunch() {
+        onView(allOf(hasFocus(), withTagKey(SearchFragment.SEARCH_TAG)))
+                .check(matches(withClassName(containsString(SearchView.class.getName()))));
+    }
+}