Fixing issue where shortcuts and widgets were not being removed when the package was uninstalled (Bug 2657997, Bug 6335843)

- Also fixes issue if we are dragging a shortcut/widget and it is removed.
- Also exposes App Info for shortcuts and widgets

Change-Id: I3bd5056f50f20e8b277dde6456df26eac815bcde

src/com/android/launcher2/DragController.java

@@ -380,10 +380,13 @@ public class DragController {
                     // Added null checks to prevent NPE we've seen in the wild
                     if (dragInfo != null &&
                         dragInfo.intent != null &&
-                        info.intent != null &&
-                        dragInfo.intent.getComponent().equals(info.intent.getComponent())) {
-                        cancelDrag();
-                        return;
+                        info.intent != null) {
+                        boolean isSamePackage = dragInfo.intent.getPackage().equals(
+                                info.intent.getPackage());
+                        if (isSamePackage) {
+                            cancelDrag();
+                            return;
+                        }
                     }
                 }
             }