Make classes that extend ItemInfo public.

Also follow up on changes in ag/418520, adding Views to those method
params.

Change-Id: I93e0a3b30d10b969d1903a2f227f6744d709e89a
diff --git a/src/com/android/launcher3/LauncherAppWidgetInfo.java b/src/com/android/launcher3/LauncherAppWidgetInfo.java
index 28df90f..950828e 100644
--- a/src/com/android/launcher3/LauncherAppWidgetInfo.java
+++ b/src/com/android/launcher3/LauncherAppWidgetInfo.java
@@ -23,7 +23,7 @@
 /**
  * Represents a widget (either instantiated or about to be) in the Launcher.
  */
-class LauncherAppWidgetInfo extends ItemInfo {
+public class LauncherAppWidgetInfo extends ItemInfo {
 
     /**
      * Indicates that the widget hasn't been instantiated yet.