Use google sans in "clear all" button

AndroidManifest-common.xml

@@ -128,7 +128,7 @@
             android:value="com.android.launcher3.LauncherProvider" />
         <meta-data
             android:name="preloaded_fonts"
-            android:resource="@array/preloaded_fonts" />
+            android:resource="@array/preloaded_fonts"/>
 
     </application>
 </manifest>

quickstep/res/layout/overview_clear_all_button.xml

@@ -19,7 +19,9 @@
     style="@android:style/Widget.DeviceDefault.Button.Borderless"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
+    android:fontFamily="@font/google_sans_medium"
     android:text="@string/recents_clear_all"
+    android:textAllCaps="false"
     android:textColor="?attr/workspaceTextColor"
     android:textSize="14sp"
     android:translationY="@dimen/task_thumbnail_half_top_margin"

quickstep/src/com/android/quickstep/views/ClearAllButton.java

@@ -17,14 +17,14 @@
 package com.android.quickstep.views;
 
 import android.content.Context;
+import android.support.v7.widget.AppCompatButton;
 import android.util.AttributeSet;
-import android.widget.Button;
 
 import com.android.launcher3.Utilities;
 import com.android.quickstep.views.RecentsView.PageCallbacks;
 import com.android.quickstep.views.RecentsView.ScrollState;
 
-public class ClearAllButton extends Button implements PageCallbacks {
+public class ClearAllButton extends AppCompatButton implements PageCallbacks {
 
     private float mScrollAlpha = 1;
     private float mContentAlpha = 1;

res/font/google_sans_medium.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     This file is part of Lawnchair Launcher.
+  ~
+  ~     Lawnchair Launcher is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     Lawnchair Launcher is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with Lawnchair Launcher.  If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<font-family xmlns:app="http://schemas.android.com/apk/res-auto"
+        app:fontProviderAuthority="com.google.android.gms.fonts"
+        app:fontProviderPackage="com.google.android.gms"
+        app:fontProviderQuery="name=Google Sans&amp;weight=500"
+        app:fontProviderCerts="@array/com_google_android_gms_fonts_certs">
+</font-family>

res/values/preloaded_fonts.xml

@@ -2,5 +2,6 @@
 <resources>
     <array name="preloaded_fonts" translatable="false">
         <item>@font/google_sans</item>
+        <item>@font/google_sans_medium</item>
     </array>
 </resources>