Bump the version of gl from 3.0 to 3.1 in ro.opengles.version property.

Change-Id: I30edc9a1d34fdbbced92487813e914efda4acbe9
diff --git a/device.mk b/device.mk
index 5747615..cba4151 100644
--- a/device.mk
+++ b/device.mk
@@ -156,7 +156,7 @@
 
 PRODUCT_PROPERTY_OVERRIDES := \
     wifi.interface=wlan0 \
-    ro.opengles.version=196608 \
+    ro.opengles.version=196609 \
     ro.sf.lcd_density=320 \
     ro.hwui.texture_cache_size=72 \
     ro.hwui.layer_cache_size=48 \