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/res/values/config.xml b/res/values/config.xml
index 15ec05b..f532fd6 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -3,4 +3,5 @@
     <integer name="config_allAppsFadeOutTime">700</integer>
     <integer name="config_allAppsBatchLoadDelay">0</integer>
     <integer name="config_allAppsBatchSize">0</integer>
+    <integer name="config_hardwareAccelerated">0</integer>
 </resources>