Shrink default path cache size

Change-Id: Id9139945837d41cc1822b796cb9837591686fcbf
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index cb5560f..e993f74 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -250,7 +250,7 @@
 #define DEFAULT_TEXTURE_CACHE_SIZE 24.0f
 #define DEFAULT_LAYER_CACHE_SIZE 16.0f
 #define DEFAULT_RENDER_BUFFER_CACHE_SIZE 2.0f
-#define DEFAULT_PATH_CACHE_SIZE 10.0f
+#define DEFAULT_PATH_CACHE_SIZE 4.0f
 #define DEFAULT_VERTEX_CACHE_SIZE 1.0f
 #define DEFAULT_PATCH_CACHE_SIZE 128 // in kB
 #define DEFAULT_GRADIENT_CACHE_SIZE 0.5f