adding hardware acceleration flag to config.xml

(later, this will let us turn on HW acceleration
via a device-specific overlay)

Change-Id: I33c957911db7ac730770b71d6644568fbfa86adf
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index b10ab92..4918aab 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -66,7 +66,8 @@
         android:name="com.android.launcher2.LauncherApplication"
         android:process="@string/process"
         android:label="@string/application_name"
-        android:icon="@drawable/ic_launcher_home">
+        android:icon="@drawable/ic_launcher_home"
+        android:hardwareAccelerated="@integer/config_hardwareAccelerated">
 
         <activity
             android:name="com.android.launcher2.Launcher"