Fix issue where shortcuts were still being added even if corresponding app is uninstalled

issue 14410162

Change-Id: I7857aace069c4eb4c1ee504088f4526d61e1f30e
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index cc87281..141368c 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -2934,6 +2934,15 @@
         return launcherApps.isActivityEnabledForProfile(cn, user);
     }
 
+    public static boolean isValidPackage(Context context, String packageName,
+            UserHandleCompat user) {
+        if (packageName == null) {
+            return false;
+        }
+        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(context);
+        return launcherApps.isPackageEnabledForProfile(packageName, user);
+    }
+
     /**
      * Make an ShortcutInfo object for a restored application or shortcut item that points
      * to a package that is not yet installed on the system.