Add search to app info list.

- add a search option menu to the manage applications page.
- add a search filter to the app list adapter to remove any app whose
app name does not contain the search query.

Change-Id: Ie749daeef2cdc4a22fade45422ae90f44d00ceb2
Fixes: 119598311
Test: make RunSettingsRoboTests

res/drawable/ic_find_in_page_24px.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2018 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.
+-->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?android:attr/colorControlNormal">
+  <path
+      android:fillColor="#FFFFFFFF"
+      android:pathData="M6,2C4.9,2 4.01,2.9 4.01,4L4,20c0,1.1 0.89,2 1.99,2H18c1.1,0 2,-0.9 2,-2V8l-6,-6H6zM18,17.59l-2.2,-2.2c0.44,-0.69 0.7,-1.51 0.7,-2.39c0,-2.48 -2.02,-4.5 -4.5,-4.5S7.5,10.52 7.5,13s2.02,4.5 4.5,4.5c0.88,0 1.69,-0.26 2.39,-0.7l3.2,3.2L6,20V4h7.17L18,8.83V17.59zM12,15.5c-1.38,0 -2.5,-1.12 -2.5,-2.5s1.12,-2.5 2.5,-2.5s2.5,1.12 2.5,2.5S13.38,15.5 12,15.5z"/>
+</vector>