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/FolderInfo.java b/src/com/android/launcher3/FolderInfo.java
index d45e4e4..42e2ec3 100644
--- a/src/com/android/launcher3/FolderInfo.java
+++ b/src/com/android/launcher3/FolderInfo.java
@@ -23,7 +23,7 @@
 /**
  * Represents a folder containing shortcuts or apps.
  */
-class FolderInfo extends ItemInfo {
+public class FolderInfo extends ItemInfo {
 
     /**
      * Whether this folder has been opened