Fix bugs with dragging items out of folders

A folder of one item wasn't converted to a single
item - this fixes that regression

It was also possible, in some rare cases, that the 
Folder cleanup code never ran after uninstalling
an app

Change-Id: Iee2490ed95d4f4a243b6f93411397a397aef7ae1
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index bb3993e..c70cbe0 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -775,7 +775,7 @@
         if (target != this) {
             if (mOnExitAlarm.alarmPending()) {
                 mOnExitAlarm.cancelAlarm();
-                if (successfulDrop) {
+                if (!successfulDrop) {
                     mSuppressFolderDeletion = true;
                 }
                 completeDragExit();