Add a property for specifying a dalvik heap growth limit.

Change-Id: I7334fb720277888df836414834ecf1e8d6b4b579
diff --git a/build/tablet-dalvik-heap.mk b/build/tablet-dalvik-heap.mk
index 9cb2f6b..37c3ec5 100644
--- a/build/tablet-dalvik-heap.mk
+++ b/build/tablet-dalvik-heap.mk
@@ -18,5 +18,5 @@
 
 PRODUCT_PROPERTY_OVERRIDES += \
     dalvik.vm.heapstartsize=5m \
-    dalvik.vm.smallheapsize=48m \
-    dalvik.vm.heapsize=48m
+    dalvik.vm.growthlimit=48m \
+    dalvik.vm.heapsize=256m