Show App Info when dragging widgets from the workspace.

Bug: 24190195
Change-Id: I65f67b7c1a1ae895035942aa97e40186ea5a206f
diff --git a/src/com/android/launcher3/UninstallDropTarget.java b/src/com/android/launcher3/UninstallDropTarget.java
index b69c79d..7388161 100644
--- a/src/com/android/launcher3/UninstallDropTarget.java
+++ b/src/com/android/launcher3/UninstallDropTarget.java
@@ -87,9 +87,12 @@
             final Runnable checkIfUninstallWasSuccess = new Runnable() {
                 @Override
                 public void run() {
-                    String packageName = componentInfo.first.getPackageName();
-                    boolean uninstallSuccessful = !AllAppsList.packageHasActivities(
-                            getContext(), packageName, user);
+                    boolean uninstallSuccessful = false;
+                    if (componentInfo != null) {
+                        String packageName = componentInfo.first.getPackageName();
+                        uninstallSuccessful = !AllAppsList.packageHasActivities(
+                                getContext(), packageName, user);
+                    }
                     sendUninstallResult(d.dragSource, uninstallSuccessful);
                 }
             };