Added suggestions for gestures.

Bug: 30986021
Test: manual + make RunSettingsRoboTests + adb shell am instrument -w
com.android.settings.tests.unit /android.support.test.runner.AndroidJUnitRunner

Change-Id: I7aed110c81ca2fb6b90e2f359b4bb941c02bc1c3

res/drawable/ic_suggestion_gesture.xml

@@ -0,0 +1,28 @@
+<!--
+    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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="32.0"
+    android:viewportHeight="32.0"
+    android:autoMirrored="true">
+    <path
+        android:fillColor="@color/material_grey_600"
+        android:pathData="M20,20.2V24H6V5.3h8.7l2.4,-4H7.6c-2.2,0 -4,1.8 -4,4v21.3c0,2.2 1.8,4 4,4h10.7c2.2,0 4,-1.8 4,-4V14.9L20,20.2zM15.6,28h-5.3v-1.3h5.3V28z"/>
+    <path
+        android:fillColor="@color/material_grey_600"
+        android:pathData="M28.5,7l1.1,-2.4L32,3.5l-2.4,-1.1L28.5,0l-1.1,2.4L25,3.5l2.4,1.1L28.5,7zM21,7.4l-2.2,-4.8l-2.2,4.8l-4.8,2.2l4.8,2.2l2.2,4.8l2.2,-4.8l4.8,-2.2L21,7.4zM28.5,12.2l-1.1,2.4L25,15.6l2.4,1.1l1.1,2.4l1.1,-2.4l2.4,-1.1l-2.4,-1.1L28.5,12.2z"/>
+</vector>