Update cache version based on new icon sizes.

Change-Id: Ia82edd366cba19efbec0c1764484c51a976c5aa1
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index ad1be7e..a65ea9b 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -111,7 +111,7 @@
      * sizes (landscape vs portrait).
      */
     private static class CacheDb extends SQLiteCacheHelper {
-        private static final int DB_VERSION = 8;
+        private static final int DB_VERSION = 9;
 
         private static final String TABLE_NAME = "shortcut_and_widget_previews";
         private static final String COLUMN_COMPONENT = "componentName";